Crash on startup when discovering assets

I’ve been trying to open a project but it keeps crashing at startup when discovering/referencing assets, specifically on 4.18.3. I’ve tried deleting the content folder and re-pasting it, trying to open a copy on 4.19, deleting the CachedAssetRegistry, and opening the project on a different computer (??). I have 0 clue as to what is going on, so all help and suggestions would be appreciated. Attached is also the log file.link text

Crash Report:

Assertion failed: (Index >= 0) & (Index < ArrayNum) [File:D:\Build++UE4+Release-4.18+Compile\Sync\Engine\Source\Runtime\Core\Public\Containers/Array.h] [Line: 610] Array index out of bounds: 0 from an array of size -877101061

UE4Editor_Core!FDebug::AssertFailed() [d:\build++ue4+release-4.18+compile\sync\engine\source\runtime\core\private\misc\assertionmacros.cpp:414]
UE4Editor_Core!FGenericPlatformString::LogBogusChars() [d:\build++ue4+release-4.18+compile\sync\engine\source\runtime\core\private\genericplatform\genericplatformstring.cpp:58]
UE4Editor_Core!operator<<() [d:\build++ue4+release-4.18+compile\sync\engine\source\runtime\core\private\containers\string.cpp:1354]
UE4Editor_AssetRegistry!FPackageReader::ReadAssetRegistryData() [d:\build++ue4+release-4.18+compile\sync\engine\source\runtime\assetregistry\private\packagereader.cpp:166]
UE4Editor_AssetRegistry!FAssetDataGatherer::ReadAssetFile() [d:\build++ue4+release-4.18+compile\sync\engine\source\runtime\assetregistry\private\assetdatagatherer.cpp:854]
UE4Editor_AssetRegistry!FAssetDataGatherer::Run() [d:\build++ue4+release-4.18+compile\sync\engine\source\runtime\assetregistry\private\assetdatagatherer.cpp:597]
UE4Editor_Core!FRunnableThreadWin::Run() [d:\build++ue4+release-4.18+compile\sync\engine\source\runtime\core\private\windows\windowsrunnablethread.cpp:76]