Cannot first run on Linux

After downloading and building the Engine following the 'Building on Linux" instructions, attempting to run the UE4Editor gives me the following error:

Increasing per-process limit of core file size to infinity.
LogInit: Display: Running engine without a game
LogPlatformFile: Not using cached read wrapper
LogInit: Display: RandInit(253699269) SRandInit(253699269).
LogTaskGraph: Started task graph with 5 named threads and 14 total threads with 3 sets of task threads.
LogStats: Stats thread started at 0.077486
LogPluginManager: Mounting plugin Paper2D
LogPluginManager: Mounting plugin LightPropagationVolume
LogPluginManager: Mounting plugin CodeLiteSourceCodeAccess
LogPluginManager: Mounting plugin GitSourceControl
LogPluginManager: Mounting plugin KDevelopSourceCodeAccess
LogPluginManager: Mounting plugin NullSourceCodeAccess
LogPluginManager: Mounting plugin PerforceSourceControl
LogPluginManager: Mounting plugin SubversionSourceControl
LogPluginManager: Mounting plugin UObjectPlugin
LogPluginManager: Mounting plugin VisualStudioSourceCodeAccess
LogPluginManager: Mounting plugin XCodeSourceCodeAccess
LogPluginManager: Mounting plugin AssetManagerEditor
LogPluginManager: Mounting plugin AudioCapture
LogPluginManager: Mounting plugin FacialAnimation
LogPluginManager: Mounting plugin GameplayTagsEditor
LogPluginManager: Mounting plugin MobileLauncherProfileWizard
LogPluginManager: Mounting plugin PluginBrowser
LogPluginManager: Mounting plugin SpeedTreeImporter
LogPluginManager: Mounting plugin AlembicImporter
LogPluginManager: Mounting plugin CharacterAI
LogPluginManager: Mounting plugin HTML5Networking
LogPluginManager: Mounting plugin AndroidMedia
LogPluginManager: Mounting plugin AvfMedia
LogPluginManager: Mounting plugin MediaPlayerEditor
LogPluginManager: Mounting plugin WmfMedia
LogPluginManager: Mounting plugin TcpMessaging
LogPluginManager: Mounting plugin UdpMessaging
LogPluginManager: Mounting plugin LevelSequenceEditor
LogPluginManager: Mounting plugin MatineeToLevelSequence
LogPluginManager: Mounting plugin OnlineSubsystemGooglePlay
LogPluginManager: Mounting plugin OnlineSubsystemIOS
LogPluginManager: Mounting plugin OnlineSubsystem
LogPluginManager: Mounting plugin OnlineSubsystemNull
LogPluginManager: Mounting plugin OnlineSubsystemUtils
LogPluginManager: Mounting plugin AndroidDeviceProfileSelector
LogPluginManager: Mounting plugin AndroidMoviePlayer
LogPluginManager: Mounting plugin AndroidPermission
LogPluginManager: Mounting plugin AppleMoviePlayer
LogPluginManager: Mounting plugin ArchVisCharacter
LogPluginManager: Mounting plugin CableComponent
LogPluginManager: Mounting plugin CustomMeshComponent
LogPluginManager: Mounting plugin ExampleDeviceProfileSelector
LogPluginManager: Mounting plugin GoogleCloudMessaging
LogPluginManager: Mounting plugin IOSDeviceProfileSelector
LogPluginManager: Mounting plugin ImmediatePhysics
LogPluginManager: Mounting plugin LinuxDeviceProfileSelector
LogPluginManager: Mounting plugin LocationServicesBPLibrary
LogPluginManager: Mounting plugin MobilePatchingUtils
LogPluginManager: Mounting plugin OculusVR
LogPluginManager: Mounting plugin PhysXVehicles
LogPluginManager: Mounting plugin ProceduralMeshComponent
LogPluginManager: Mounting plugin RuntimePhysXCooking
LogPluginManager: Mounting plugin SteamVR
LogPluginManager: Mounting plugin WindowsMoviePlayer
LogInit: Using libcurl 7.48.0-DEV
LogInit: - built for x86_64-unknown-linux-gnu
LogInit: - supports SSL with OpenSSL/1.0.2h
LogInit: - supports HTTP deflate (compression) using libz 1.2.8
LogInit: - other features:
LogInit: CURL_VERSION_SSL
LogInit: CURL_VERSION_LIBZ
LogInit: CURL_VERSION_IPV6
LogInit: CURL_VERSION_ASYNCHDNS
LogInit: CURL_VERSION_LARGEFILE
LogInit: CURL_VERSION_TLSAUTH_SRP
LogInit: Libcurl: checking if ‘/etc/pki/tls/certs/ca-bundle.crt’ exists
LogInit: Libcurl: checking if ‘/etc/ssl/certs/ca-certificates.crt’ exists
LogInit: CurlRequestOptions (configurable via config and command line):
LogInit: - bVerifyPeer = true - Libcurl will verify peer certificate
LogInit: - bUseHttpProxy = false - Libcurl will NOT use HTTP proxy
LogInit: - bDontReuseConnections = false - Libcurl will reuse connections
LogInit: - CertBundlePath = /etc/ssl/certs/ca-certificates.crt - Libcurl will set CURLOPT_CAINFO to it
LogInit: Build: ++UE4+Release-4.17-CL-0
LogInit: Engine Version: 4.17.2-0+++UE4+Release-4.17
LogInit: Compatible Engine Version: 4.17.0-0+++UE4+Release-4.17
LogInit: Net CL: 0
LogDevObjectVersion: Number of dev versions registered: 16
LogDevObjectVersion: Dev-Blueprints (B0D832E4-1F89-4F0D-ACCF-7EB736FD4AA2): 10
LogDevObjectVersion: Dev-Build (E1C64328-A22C-4D53-A36C-8E866417BD8C): 0
LogDevObjectVersion: Dev-Core (375EC13C-06E4-48FB-B500-84F0262A717E): 2
LogDevObjectVersion: Dev-Editor (E4B068ED-F494-42E9-A231-DA0B2E46BB41): 20
LogDevObjectVersion: Dev-Framework (CFFC743F-43B0-4480-9391-14DF171D2073): 28
LogDevObjectVersion: Dev-Mobile (B02B49B5-BB20-44E9-A304-32B752E40360): 0
LogDevObjectVersion: Dev-Networking (A4E4105C-59A1-49B5-A7C5-40C4547EDFEE): 0
LogDevObjectVersion: Dev-Online (39C831C9-5AE6-47DC-9A44-9C173E1C8E7C): 0
LogDevObjectVersion: Dev-Physics (78F01B33-EBEA-4F98-B9B4-84EACCB95AA2): 0
LogDevObjectVersion: Dev-Platform (6631380F-2D4D-43E0-8009-CF276956A95A): 0
LogDevObjectVersion: Dev-Rendering (12F88B9F-8875-4AFC-A67C-D90C383ABD29): 19
LogDevObjectVersion: Dev-Sequencer (7B5AE74C-D270-4C10-A958-57980B212A5A): 4
LogDevObjectVersion: Dev-VR (D7296918-1DD6-4BDD-9DE2-64A83CC13884): 0
LogDevObjectVersion: Dev-LoadTimes (C2A15278-BFE7-4AFE-6C17-90FF531DF755): 1
LogDevObjectVersion: Private-Geometry (6EACA3D4-40EC-4CC1-B786-8BED09428FC5): 1
LogDevObjectVersion: Dev-AnimPhys (29E575DD-E0A3-4627-9D10-D276232CDCEA): 7
LogInit: Compiled (64-bit): Apr 17 2018 18:20:00
LogInit: Compiled with Clang: 3.8.0 (tags/RELEASE_380/final)
LogInit: Build Configuration: Development
LogInit: Branch Name: ++UE4+Release-4.17
LogInit: Command line:
LogInit: Base directory: /cs/vml4/shah/UnrealEngine/Engine/Binaries/Linux/
LogInit: Installed Engine Build: 0
LogInit: Presizing for max 8388607 objects, including 0 objects not considered by GC, pre-allocating 0 bytes for permanent pool.
LogInit: Object subsystem initialized
[2018.04.18-02.24.41:646][ 0]LogInit: Initializing SDL.
[2018.04.18-02.24.41:646][ 0]LogInit: Using SDL_WINDOW_OPENGL
Xlib: extension “RANDR” missing on display “:2.0”.
[2018.04.18-02.24.41:670][ 0]LogInit: Warning: Could not initialize SDL: XRandR support is required but not available
[2018.04.18-02.24.41:670][ 0]LogInit: Warning: FDisplayMetrics::GetDisplayMetrics: PlatformInitMultimedia() failed, cannot get display metrics
[2018.04.18-02.24.41:670][ 0]LogLinux: Selected Device Profile: [Linux]
[2018.04.18-02.24.41:670][ 0]LogInit: Applying CVar settings loaded from the selected device profile: [Linux]
[2018.04.18-02.24.41:750][ 0]LogInit: Linux hardware info:
[2018.04.18-02.24.41:750][ 0]LogInit: - we are the first instance of this executable
[2018.04.18-02.24.41:750][ 0]LogInit: - this process’ id (pid) is 29217, parent process’ id (ppid) is 2417
[2018.04.18-02.24.41:750][ 0]LogInit: - we are not running under debugger
[2018.04.18-02.24.41:750][ 0]LogInit: - machine network name is ‘cs-vml-29’
[2018.04.18-02.24.41:750][ 0]LogInit: - user name is ‘hushah’ (hushah)
[2018.04.18-02.24.41:750][ 0]LogInit: - we’re logged in remotely
[2018.04.18-02.24.41:750][ 0]LogInit: - we’re running with rendering
[2018.04.18-02.24.41:750][ 0]LogInit: - CPU: GenuineIntel ‘Intel(R) Core™ i7-4790 CPU @ 3.60GHz’ (signature: 0x306C3)
[2018.04.18-02.24.41:750][ 0]LogInit: - Number of physical cores available for the process: 4
[2018.04.18-02.24.41:750][ 0]LogInit: - Number of logical cores available for the process: 8
[2018.04.18-02.24.41:750][ 0]LogInit: - Cache line size: 64
[2018.04.18-02.24.41:750][ 0]LogInit: - Memory allocator used: binned2
[2018.04.18-02.24.41:750][ 0]LogLinux: Benchmarking clocks:
[2018.04.18-02.24.41:750][ 0]LogLinux: - CLOCK_REALTIME (id=0) can sustain 64442516 (64443K, 64M) calls per second without zero deltas.
[2018.04.18-02.24.41:750][ 0]LogLinux: - CLOCK_MONOTONIC (id=1) can sustain 65400735 (65401K, 65M) calls per second without zero deltas.
[2018.04.18-02.24.41:750][ 0]LogLinux: - CLOCK_MONOTONIC_RAW (id=4) can sustain 6102386 (6102K, 6M) calls per second without zero deltas.
[2018.04.18-02.24.41:750][ 0]LogLinux: - CLOCK_MONOTONIC_COARSE (id=6) can sustain 212293925 (212294K, 212M) calls per second with 99.999878% zero deltas.
[2018.04.18-02.24.41:750][ 0]LogLinux: Selected clock_id 1 (CLOCK_MONOTONIC) since it is the fastest support clock without zero deltas.
[2018.04.18-02.24.41:750][ 0]LogInit: Linux-specific commandline switches:
[2018.04.18-02.24.41:750][ 0]LogInit: -nodwarf (currently OFF): suppress parsing of DWARF debug info (callstacks will be generated faster, but won’t have line numbers)
[2018.04.18-02.24.41:750][ 0]LogInit: -ansimalloc - use malloc()/free() from libc (useful for tools like valgrind and electric fence)
[2018.04.18-02.24.41:750][ 0]LogInit: -jemalloc - use jemalloc for all memory allocation
[2018.04.18-02.24.41:750][ 0]LogInit: -binnedmalloc - use binned malloc for all memory allocation
[2018.04.18-02.24.41:750][ 0]LogInit: -httpproxy=ADDRESS:PORT - redirects HTTP requests to a proxy (only supported if compiled with libcurl)
[2018.04.18-02.24.41:750][ 0]LogInit: -reuseconn - allow libcurl to reuse HTTP connections (only matters if compiled with libcurl)
[2018.04.18-02.24.41:750][ 0]LogInit: -virtmemkb=NUMBER - sets process virtual memory (address space) limit (overrides VirtualMemoryLimitInKB value from .ini)
[2018.04.18-02.24.41:750][ 0]LogInit: Initializing SDL.
[2018.04.18-02.24.41:750][ 0]LogInit: Using SDL_WINDOW_OPENGL
Xlib: extension “RANDR” missing on display “:2.0”.
[2018.04.18-02.24.41:770][ 0]LogInit: Warning: Could not initialize SDL: XRandR support is required but not available
[2018.04.18-02.24.41:770][ 0]LogInit: - Physical RAM available (not considering process quota): 32 GB (32080 MB, 32850708 KB, 33639124992 bytes)
[2018.04.18-02.24.41:841][ 0]LogInit: Using OS detected language (en-CA).
[2018.04.18-02.24.41:841][ 0]LogInit: Using OS detected locale (en-CA).
[2018.04.18-02.24.41:927][ 0]LogTextLocalizationManager: No specific localization for ‘en-CA’ exists, so the ‘en’ localization will be used.
[2018.04.18-02.24.42:521][ 0]LogInit: Initializing SDL.
[2018.04.18-02.24.42:521][ 0]LogInit: Using SDL_WINDOW_OPENGL
Xlib: extension “RANDR” missing on display “:2.0”.
[2018.04.18-02.24.42:540][ 0]LogInit: Warning: Could not initialize SDL: XRandR support is required but not available
[2018.04.18-02.24.42:541][ 0]LogInit: Warning: LinuxSplash_InitSplashResources() : PlatformInitMultimedia() failed, there will be no splash.
[2018.04.18-02.24.42:541][ 0]LogInit: Initializing SDL.
[2018.04.18-02.24.42:541][ 0]LogInit: Using SDL_WINDOW_OPENGL
Xlib: extension “RANDR” missing on display “:2.0”.
[2018.04.18-02.24.42:560][ 0]LogInit: Warning: Could not initialize SDL: XRandR support is required but not available
Fatal error: [File:/cs/vml4/shah/UnrealEngine/Engine/Source/Runtime/Core/Private/Linux/LinuxApplication.cpp] [Line: 36]
FLinuxApplication::CreateLinuxApplication() : PlatformInitMultimedia() failed, cannot create application instance.
[2018.04.18-02.24.42:565][ 0]LogLinux: Error: appError called: Assertion failed: Assertion failed: [File:/cs/vml4/shah/UnrealEngine/Engine/Source/Runtime/Core/Private/Linux/LinuxApplication.cpp] [Line: 36]
FLinuxApplication::CreateLinuxApplication() : PlatformInitMultimedia() failed, cannot create application instance.

Signal 11 caught.
Malloc Size=131076 LargeMemoryPoolOffset=131092
CommonLinuxCrashHandler: Signal=11
Malloc Size=65535 LargeMemoryPoolOffset=196655
[2018.04.18-02.24.42:606][ 0]LogLinux: === Critical error: ===
Unhandled Exception: SIGSEGV: invalid attempt to write memory at address 0x0000000000000003

[2018.04.18-02.24.42:606][ 0]LogLinux: Assertion failed: Assertion failed: [File:/cs/vml4/shah/UnrealEngine/Engine/Source/Runtime/Core/Private/Linux/LinuxApplication.cpp] [Line: 36]
FLinuxApplication::CreateLinuxApplication() : PlatformInitMultimedia() failed, cannot create application instance.

[Callstack] 00 0x00007f6c11654c9f FLinuxPlatformStackWalk::CaptureStackBackTrace(unsigned long long*, unsigned int, void*)
[Callstack] 01 0x00007f6c114e2025 FGenericPlatformStackWalk::StackWalkAndDump(char*, unsigned long, int, void*)
[Callstack] 02 0x00007f6c115f9311 FLinuxCrashContext::CaptureStackTrace()
[Callstack] 03 0x00007f6c061b05f0 CommonLinuxCrashHandler(FGenericCrashContext const&)
[Callstack] 04 0x00007f6c115fb2dd PlatformCrashHandler(int, siginfo_t*, void*)
[Callstack] 05 0x00007f6c18081390 /lib/x86_64-linux-gnu/libpthread.so.0(+0x11390) [0x7f6c18081390]
[Callstack] 06 0x00007f6c114d4574 FGenericPlatformMisc::RaiseException(unsigned int)
[Callstack] 07 0x00007f6c11644ddd FOutputDeviceLinuxError::Serialize(wchar_t const*, ELogVerbosity::Type, FName const&)
[Callstack] 08 0x00007f6c1170f0a8 FOutputDevice::Logf(wchar_t const*, …)
[Callstack] 09 0x00007f6c116997ca FDebug::AssertFailed(char const*, char const*, int, wchar_t const*, …)
[Callstack] 10 0x00007f6c115e94d2 FLinuxApplication::CreateLinuxApplication()
[Callstack] 11 0x00007f6c09f4c2de FSlateApplication::Create()
[Callstack] 12 0x000000000041a766 FEngineLoop::PreInit(wchar_t const*) [/cs/vml4/shah/UnrealEngine/Engine/Source/Runtime/Launch/Private/LaunchEngineLoop.cpp, line 1668]
[Callstack] 13 0x000000000042c4f8 GuardedMain(wchar_t const*) [/cs/vml4/shah/UnrealEngine/Engine/Source/Runtime/Launch/Private/Launch.cpp, line 42]
[Callstack] 14 0x00007f6c061b1497 CommonLinuxMain(int, char**, int ()(wchar_t const))
[Callstack] 15 0x00007f6c05bfc830 /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf0) [0x7f6c05bfc830]
[Callstack] 16 0x0000000000416a19 ./UE4Editor(_start+0x29) [0x416a19]

Fatal error: [File:/cs/vml4/shah/UnrealEngine/Engine/Source/Runtime/Core/Private/Linux/LinuxPlatformMisc.cpp] [Line: 473]
Error copying clipboard contents: Video subsystem must be initialized to set clipboard text

[2018.04.18-02.24.42:626][ 0]LogExit: Executing StaticShutdownAfterError
LogPlatformFile: Not using cached read wrapper
LogInit: Display: RandInit(677311535) SRandInit(677311535).
LogTaskGraph: Started task graph with 4 named threads and 7 total threads with 1 sets of task threads.
LogInit: Build: ++UE4+Release-4.17-CL-0
LogInit: Engine Version: 4.17.2-0+++UE4+Release-4.17
LogInit: Compatible Engine Version: 4.17.0-0+++UE4+Release-4.17
LogInit: Net CL: 0
LogInit: Compiled (64-bit): Apr 17 2018 11:46:01
LogInit: Compiled with Clang: 3.8.0 (tags/RELEASE_380/final)
LogInit: Build Configuration: Shipping
LogInit: Branch Name: ++UE4+Release-4.17
LogInit: Command line: -Abslog=/cs/vml4/shah/UnrealEngine/Engine/Saved/Logs/UE4-CRC.log /cs/vml4/shah/UnrealEngine/Engine/Saved/Crashes/crashinfo–pid-29217-000329392A041311001802720F9A55CD/
LogInit: Base directory: /cs/vml4/shah/UnrealEngine/Engine/Binaries/Linux/
LogInit: Installed Engine Build: 1
LogInit: Presizing for max 100000 objects, including 0 objects not considered by GC, pre-allocating 0 bytes for permanent pool.
LogInit: Object subsystem initialized
[2018.04.18-02.24.43:439][ 0]LogInit: Linux hardware info:
[2018.04.18-02.24.43:439][ 0]LogInit: - we are the first instance of this executable
[2018.04.18-02.24.43:439][ 0]LogInit: - this process’ id (pid) is 29285, parent process’ id (ppid) is 29217
[2018.04.18-02.24.43:439][ 0]LogInit: - we are not running under debugger
[2018.04.18-02.24.43:439][ 0]LogInit: - machine network name is ‘cs-vml-29’
[2018.04.18-02.24.43:439][ 0]LogInit: - user name is ‘hushah’ (hushah)
[2018.04.18-02.24.43:439][ 0]LogInit: - we’re logged in remotely
[2018.04.18-02.24.43:439][ 0]LogInit: - we’re running with rendering
[2018.04.18-02.24.43:439][ 0]LogInit: - CPU: GenuineIntel ‘Intel(R) Core™ i7-4790 CPU @ 3.60GHz’ (signature: 0x306C3)
[2018.04.18-02.24.43:439][ 0]LogInit: - Number of physical cores available for the process: 4
[2018.04.18-02.24.43:440][ 0]LogInit: - Number of logical cores available for the process: 8
[2018.04.18-02.24.43:440][ 0]LogInit: - Cache line size: 64
[2018.04.18-02.24.43:440][ 0]LogInit: - Memory allocator used: binned2
[2018.04.18-02.24.43:440][ 0]LogLinux: Skipped benchmarking clocks because the engine is running in a standalone program mode - CLOCK_REALTIME will be used.
[2018.04.18-02.24.43:440][ 0]LogInit: Linux-specific commandline switches:
[2018.04.18-02.24.43:440][ 0]LogInit: -nodwarf (currently OFF): suppress parsing of DWARF debug info (callstacks will be generated faster, but won’t have line numbers)
[2018.04.18-02.24.43:440][ 0]LogInit: -ansimalloc - use malloc()/free() from libc (useful for tools like valgrind and electric fence)
[2018.04.18-02.24.43:440][ 0]LogInit: -jemalloc - use jemalloc for all memory allocation
[2018.04.18-02.24.43:440][ 0]LogInit: -binnedmalloc - use binned malloc for all memory allocation
[2018.04.18-02.24.43:440][ 0]LogInit: -httpproxy=ADDRESS:PORT - redirects HTTP requests to a proxy (only supported if compiled with libcurl)
[2018.04.18-02.24.43:440][ 0]LogInit: -reuseconn - allow libcurl to reuse HTTP connections (only matters if compiled with libcurl)
[2018.04.18-02.24.43:440][ 0]LogInit: -virtmemkb=NUMBER - sets process virtual memory (address space) limit (overrides VirtualMemoryLimitInKB value from .ini)
[2018.04.18-02.24.43:440][ 0]LogInit: - Physical RAM available (not considering process quota): 32 GB (32080 MB, 32850708 KB, 33639124992 bytes)
[2018.04.18-02.24.43:443][ 0]LogUObjectArray: 149 objects as part of root set at end of initial load.
[2018.04.18-02.24.43:443][ 0]LogUObjectAllocator: 24528 out of 0 bytes used by permanent object pool.
[2018.04.18-02.24.43:443][ 0]LogUObjectArray: CloseDisregardForGC: 0/0 objects in disregard for GC pool
[2018.04.18-02.24.43:443][ 0]LogInit: Using OS detected language ().
[2018.04.18-02.24.43:443][ 0]LogInit: Using OS detected locale ().
[2018.04.18-02.24.43:443][ 0]LogTextLocalizationManager: No localization for ‘’ exists, so ‘en’ will be used for the language.
[2018.04.18-02.24.43:443][ 0]LogTextLocalizationManager: No localization for ‘’ exists, so ‘en’ will be used for the locale.
[2018.04.18-02.24.43:446][ 0]CrashReportClientLog: CrashReportClientVersion=1.0
[2018.04.18-02.24.43:446][ 0]CrashReportClientLog: CrashReportReceiver disabled
[2018.04.18-02.24.43:446][ 0]CrashReportClientLog: DataRouterUrl: https://datarouter.ol.epicgames.com/datarouter/api/v1/public/data
[2018.04.18-02.24.43:455][ 0]CrashReportClientLog: Initial state = Unknown UploadState value
[2018.04.18-02.24.43:455][ 0]CrashReportClientLog: Initial state = Unknown UploadState value
[2018.04.18-02.24.43:456][ 0]LogCrashDebugHelper: DepotName: //UE4/Release-4.17
[2018.04.18-02.24.43:456][ 0]LogCrashDebugHelper: BuiltFromCL: 0
[2018.04.18-02.24.43:456][ 0]LogCrashDebugHelper: EngineVersion: 4.17.2-0+++UE4+Release-4.17
[2018.04.18-02.24.43:456][ 0]LogCrashDebugHelper: BuildVersion: ++UE4+Release-4.17-CL-0
[2018.04.18-02.24.43:456][ 0]LogCrashDebugHelper: Warning: CrashDebugHelperConfig invalid
[2018.04.18-02.24.43:456][ 0]LogCrashDebugHelper: Warning: PDB Cache disabled
[2018.04.18-02.24.44:455][ 0]CrashReportClientLog: Got 5 pending files to upload from ‘crashinfo–pid-29217-000329392A041311001802720F9A55CD’
[2018.04.18-02.24.44:455][ 0]CrashReportClientLog: State change from Ready to SendingFiles
[2018.04.18-02.24.44:455][ 0]CrashReportClientLog: CompressAndSendData have 5 pending files
[2018.04.18-02.24.44:456][ 0]CrashReportClientLog: CompressAndSendData compressing 1875 bytes (’/cs/vml4/shah/UnrealEngine/Engine/Saved/Crashes/crashinfo–pid-29217-000329392A041311001802720F9A55CD/Diagnostics.txt’)
[2018.04.18-02.24.44:458][ 0]CrashReportClientLog: CompressAndSendData compressing 1918 bytes (’/cs/vml4/shah/UnrealEngine/Engine/Saved/Crashes/crashinfo–pid-29217-000329392A041311001802720F9A55CD/wermeta.xml’)
[2018.04.18-02.24.44:459][ 0]CrashReportClientLog: CompressAndSendData compressing 4 bytes (’/cs/vml4/shah/UnrealEngine/Engine/Saved/Crashes/crashinfo–pid-29217-000329392A041311001802720F9A55CD/minidump.dmp’)
[2018.04.18-02.24.44:459][ 0]CrashReportClientLog: CompressAndSendData compressing 13526 bytes (’/cs/vml4/shah/UnrealEngine/Engine/Saved/Crashes/crashinfo–pid-29217-000329392A041311001802720F9A55CD/UE4.log’)
[2018.04.18-02.24.44:460][ 0]CrashReportClientLog: CompressAndSendData compressing 108 bytes (’/cs/vml4/shah/UnrealEngine/Engine/Saved/Crashes/crashinfo–pid-29217-000329392A041311001802720F9A55CD/CrashReportClient.ini’)
[2018.04.18-02.24.44:472][ 0]LogInit: Using libcurl 7.48.0-DEV
[2018.04.18-02.24.44:473][ 0]LogInit: - built for x86_64-unknown-linux-gnu
[2018.04.18-02.24.44:473][ 0]LogInit: - supports SSL with OpenSSL/1.0.2h
[2018.04.18-02.24.44:473][ 0]LogInit: - supports HTTP deflate (compression) using libz 1.2.8
[2018.04.18-02.24.44:473][ 0]LogInit: - other features:
[2018.04.18-02.24.44:473][ 0]LogInit: CURL_VERSION_SSL
[2018.04.18-02.24.44:473][ 0]LogInit: CURL_VERSION_LIBZ
[2018.04.18-02.24.44:473][ 0]LogInit: CURL_VERSION_IPV6
[2018.04.18-02.24.44:473][ 0]LogInit: CURL_VERSION_ASYNCHDNS
[2018.04.18-02.24.44:473][ 0]LogInit: CURL_VERSION_LARGEFILE
[2018.04.18-02.24.44:473][ 0]LogInit: CURL_VERSION_TLSAUTH_SRP
[2018.04.18-02.24.44:473][ 0]LogInit: Libcurl: checking if ‘/etc/pki/tls/certs/ca-bundle.crt’ exists
[2018.04.18-02.24.44:473][ 0]LogInit: Libcurl: checking if ‘/etc/ssl/certs/ca-certificates.crt’ exists
[2018.04.18-02.24.44:473][ 0]LogInit: CurlRequestOptions (configurable via config and command line):
[2018.04.18-02.24.44:473][ 0]LogInit: - bVerifyPeer = true - Libcurl will verify peer certificate
[2018.04.18-02.24.44:473][ 0]LogInit: - bUseHttpProxy = false - Libcurl will NOT use HTTP proxy
[2018.04.18-02.24.44:473][ 0]LogInit: - bDontReuseConnections = false - Libcurl will reuse connections
[2018.04.18-02.24.44:473][ 0]LogInit: - CertBundlePath = /etc/ssl/certs/ca-certificates.crt - Libcurl will set CURLOPT_CAINFO to it
[2018.04.18-02.24.44:473][ 0]CrashReportClientLog: Sending HTTP request: https://datarouter.ol.epicgames.com/datarouter/api/v1/public/data?AppID=CrashReporter&AppVersion=4.17.2-0%2B%2B%2BUE4%2BRelease-4.17&AppEnvironment=Release&UploadType=crashreports&UserID=0002682834040b11002c0121bbdadcc7||3e5515661d0e4d119ee9aef69803565a
[2018.04.18-02.24.44:843][ 0]CrashReportClientLog: OnProcessRequestComplete(), State=SendingFiles bSucceeded=1
[2018.04.18-02.24.44:843][ 0]CrashReportClientLog: State change from SendingFiles to SendingFiles
[2018.04.18-02.24.44:843][ 0]CrashReportClientLog: All uploads done
[2018.04.18-02.24.44:843][ 0]CrashReportClientLog: State change from SendingFiles to Finished
[2018.04.18-02.24.45:456][ 0]LogLinux: FLinuxPlatformMisc::RequestExit(0)
[2018.04.18-02.24.45:456][ 0]LogGenericPlatformMisc: FPlatformMisc::RequestExit(0)
[2018.04.18-02.24.45:478][ 0]CrashReportClientLog: Final state (Receiver) = Finished
[2018.04.18-02.24.45:478][ 0]CrashReportClientLog: Final state (Receiver) = Unknown UploadState value
[2018.04.18-02.24.45:478][ 0]LogExit: Preparing to exit.
[2018.04.18-02.24.45:478][ 0]LogExit: Object subsystem successfully closed.
[2018.04.18-02.24.45:479][ 0]LogModuleManager: Shutting down and abandoning module HTTP (8)
[2018.04.18-02.24.45:510][ 0]LogModuleManager: Shutting down and abandoning module SSL (7)
[2018.04.18-02.24.45:511][ 0]LogModuleManager: Shutting down and abandoning module CrashDebugHelper (4)
[2018.04.18-02.24.45:511][ 0]LogModuleManager: Shutting down and abandoning module CoreUObject (2)
[2018.04.18-02.24.45:511][ 0]LogExit: Exiting.
Engine crash handling finished; re-raising signal 11 for the default handler. Good bye.
Segmentation fault (core dumped)
cs-vml-29:/cs/vml4/shah/UnrealEngine/Engine/Binaries/Linux%

Seems like RandR extension is missing from your X server.