Creating a C++ project in version 5.6 fails to compile, making it impossible to open the project. All versions below 5.6 have been tested and work without any issues, allowing for normal compilation and opening.

Running E:/Epic Games/UE_5.6/Engine/Build/BatchFiles/Build.bat Development Win64 -Project=“D:/CPPTest/CPPTest.uproject” -TargetType=Editor -Progress -NoEngineChanges -NoHotReloadFromIDE
Using bundled DotNet SDK version: 8.0.300 win-x64
Running UnrealBuildTool: dotnet “....\Engine\Binaries\DotNET\UnrealBuildTool\UnrealBuildTool.dll” Development Win64 -Project=“D:/CPPTest/CPPTest.uproject” -TargetType=Editor -Progress -NoEngineChanges -NoHotReloadFromIDE
Log file: C:\Users\zhouh\AppData\Local\UnrealBuildTool\Log.txt
Creating makefile for CPPTestEditor (no existing makefile)
@progress push 5%
Parsing headers for CPPTestEditor
Running Internal UnrealHeaderTool D:\CPPTest\CPPTest.uproject D:\CPPTest\Intermediate\Build\Win64\CPPTestEditor\Development\CPPTestEditor.uhtmanifest -WarningsAsErrors -installed
Total of 0 written
Reflection code generated for CPPTestEditor in 2.2850957 seconds
@progress pop
Building CPPTestEditor…
Using Visual Studio 2022 14.38.33145 toolchain (E:\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.38.33130) and Windows 10.0.22621.0 SDK (C:\Program Files (x86)\Windows Kits\10).
Determining max actions to execute in parallel (6 physical cores, 12 logical cores)
Executing up to 6 processes, one per physical core
Using Unreal Build Accelerator local executor to run 7 action(s)
Storage capacity 40Gb
---- Starting trace: 250804_164806 ----
UbaServer - Listening on 0.0.0.0:1345
------ Building 7 action(s) started ------
[1/7] Resource Default.rc2
Resource Default.rc2: Exited with error code -1 . The build will fail.
Resource Default.rc2: WorkingDirectory E:\Epic Games\UE_5.6\Engine\Source
Resource Default.rc2: C:\Program Files (x86)\Windows Kits\10\bin\10.0.22621.0\x64\rc.exe /nologo /D_WIN64 /l 0x409 /I “.” /I “E:/Microsoft Visual Studio/2022/Community/VC/Tools/MSVC/14.38.33130/INCLUDE” /I “C:/Program Files (x86)/Windows Kits/10/include/10.0.22621.0/ucrt” /I “C:/Program Files (x86)/Windows Kits/10/include/10.0.22621.0/shared” /I “C:/Program Files (x86)/Windows Kits/10/include/10.0.22621.0/um” /I “C:/Program Files (x86)/Windows Kits/10/include/10.0.22621.0/winrt” /DIS_PROGRAM=0 /DUE_EDITOR=1 /DUSE_SHADER_COMPILER_WORKER_TRACE=0 /DUE_REFERENCE_COLLECTOR_REQUIRE_OBJECTPTR=1 /DWITH_VERSE_VM=0 /DENABLE_PGO_PROFILE=0 /DUSE_VORBIS_FOR_STREAMING=1 /DUSE_XMA2_FOR_STREAMING=1 /DWITH_DEV_AUTOMATION_TESTS=1 /DWITH_PERF_AUTOMATION_TESTS=1 /DWITH_LOW_LEVEL_TESTS=0 /DEXPLICIT_TESTS_TARGET=0 /DWITH_TESTS=1 /DUNICODE /D_UNICODE /D__UNREAL__ /DIS_MONOLITHIC=0 /DIS_MERGEDMODULES=0 /DWITH_ENGINE=1 /DWITH_UNREAL_DEVELOPER_TOOLS=1 /DWITH_UNREAL_TARGET_DEVELOPER_TOOLS=1 /DWITH_APPLICATION_CORE=1 /DWITH_COREUOBJECT=1 /DUE_TRACE_ENABLED=1 /DUE_TRACE_FORCE_ENABLED=0 /DWITH_VERSE=1 /DUE_USE_VERSE_PATHS=1 /DWITH_VERSE_BPVM=1 /DUSE_STATS_WITHOUT_ENGINE=0 /DWITH_PLUGIN_SUPPORT=0 /DWITH_ACCESSIBILITY=1 /DWITH_PERFCOUNTERS=1 /DWITH_FIXED_TIME_STEP_SUPPORT=1 /DUSE_LOGGING_IN_SHIPPING=0 /DALLOW_CONSOLE_IN_SHIPPING=0 /DALLOW_PROFILEGPU_IN_TEST=0 /DALLOW_PROFILEGPU_IN_SHIPPING=0 /DWITH_LOGGING_TO_MEMORY=0 /DUSE_CACHE_FREED_OS_ALLOCS=1 /DUSE_CHECKS_IN_SHIPPING=0 /DUSE_UTF8_TCHARS=0 /DUSE_ESTIMATED_UTCNOW=0 /DUE_ALLOW_EXEC_COMMANDS_IN_SHIPPING=1 /DWITH_EDITOR=1 /DWITH_IOSTORE_IN_EDITOR=1 /DWITH_CLIENT_CODE=1 /DWITH_SERVER_CODE=1 /DUE_FNAME_OUTLINE_NUMBER=0 /DWITH_PUSH_MODEL=1 /DWITH_CEF3=1 /DWITH_LIVE_CODING=1 /DWITH_CPP_MODULES=0 /DWITH_CPP_COROUTINES=0 /DWITH_PROCESS_PRIORITY_CONTROL=0 /DUBT_MODULE_MANIFEST=“UnrealEditor.modules” /DUBT_MODULE_MANIFEST_DEBUGGAME=“UnrealEditor-Win64-DebugGame.modules” /DUBT_COMPILED_PLATFORM=Win64 /DUBT_COMPILED_TARGET=Editor /DUE_APP_NAME=“UnrealEditor” /DUE_WARNINGS_AS_ERRORS=0 /DFORCE_ANSI_ALLOCATOR=0 /DUSE_MALLOC_BINNED2=1 /DUSE_MALLOC_BINNED3=0 /DNDIS_MINIPORT_MAJOR_VERSION=0 /DWIN32=1 /D_WIN32_WINNT=0x0601 /DWINVER=0x0601 /DPLATFORM_WINDOWS=1 /DPLATFORM_MICROSOFT=1 /DOVERRIDE_PLATFORM_HEADER_NAME=Windows /DRHI_RAYTRACING=1 /DWINDOWS_MAX_NUM_TLS_SLOTS=2048 /DWINDOWS_MAX_NUM_THREADS_WITH_TLS_SLOTS=512 /DNDEBUG=1 /DUE_BUILD_DEVELOPMENT=1 /DORIGINAL_FILE_NAME=“UnrealEditor-CPPTest.dll” /DBUILD_ICON_FILE_NAME=“"..\Build\Windows\Resources\Default.ico"” /DPROJECT_COPYRIGHT_STRING=“Fill out your copyright notice in the Description page of Project Settings.” /DPROJECT_PRODUCT_IDENTIFIER=CPPTest /fo “D:/CPPTest/Intermediate/Build/Win64/x64/UnrealEditor/Development/CPPTest/Default.rc2.res” “../Build/Windows/Resources/Default.rc2”
[2/7] Compile [x64] SharedPCH.UnrealEd.Project.ValApi.ValExpApi.Cpp20.cpp
[3/7] Compile [x64] CPPTest.cpp
[4/7] Compile [x64] PerModuleInline.gen.cpp
Trace written to file C:/Users/zhouh/AppData/Local/UnrealBuildTool/Log.uba with size 11.4kb
Total time in Unreal Build Accelerator local executor: 82.37 seconds

Result: Failed (OtherCompilationError)
Total execution time: 125.18 seconds