Editor crashes opening project

Hi

I need some help here.

A bit of context: I have a project that I am using for testing purposes and so I migrated a lot of assets from different marketplace free stuff and learning examples in order to play around. It all worked fine, but today it started crashing on the Landscape Map level when trying to play or saving the map. I could just open the project afterwards and test other levels allright. So I closed eveything.

In this same project I created a level for mapping out a gym space that is going to open and I am using screenshots for the builders. I wanted to make some changes but when opening the project…It just crashes. So now I’m stuck.

This is what I get on the crash reporter:

MachineId:AC333A424805117A916BC19B19E823AE
EpicAccountId:c5ebeb467b0447b287b7faf454e5c104

Unknown exception - code 00000001 (first/second chance not available)

Assertion failed: InPos<=Bytes.Num() [File:D:\BuildFarm\buildmachine_++depot+UE4-Releases+4.7\Engine\Source\Runtime\Core\Public\Serialization\Archive.h] [Line: 171]

KERNELBASE + 35740 bytes
UE4Editor_Core!FOutputDeviceWindowsError::Serialize() + 292 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\private\windows\windowsplatformoutputdevices.cpp:95]
UE4Editor_Core!FOutputDevice::Logf__VA() + 248 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\private\misc\outputdevice.cpp:144]
UE4Editor_Core!FDebug::AssertFailed() + 1079 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\private\misc\outputdevice.cpp:224]
UE4Editor_AssetRegistry!FMemoryReader::Seek() + 78 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\public\serialization\archive.h:172]
UE4Editor_AssetRegistry!FNameTableArchiveReader::SerializeNameMap() + 117 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\assetregistry\private\nametablearchive.cpp:45]
UE4Editor_AssetRegistry!FNameTableArchiveReader::LoadFile() + 188 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\assetregistry\private\nametablearchive.cpp:26]
UE4Editor_AssetRegistry!FAssetDataGatherer::Run() + 236 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\assetregistry\private\assetdatagatherer.cpp:79]
UE4Editor_Core!FRunnableThreadWin::Run() + 102 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\private\windows\windowsrunnablethread.cpp:73]
UE4Editor_Core!FRunnableThreadWin::GuardedRun() + 93 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\private\windows\windowsrunnablethread.cpp:26]
kernel32 + 5074 bytes
ntdll + 87108 bytes

Any help would be appreciated.

Thanks for your time and attention.

For the record, other projects work fine.