Crash report help? Project crashing at 96% while loading startup level

The crash report I keep getting is copied below and I use blueprints mostly so I don’t really know how to address this. Worst is the editor opened fine literally until this point and I haven’t actually moved any assets in or out of the editor when these crashes started happening. Any advice or similar experiences would be appreciated
Screenshot (1262)
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LoginId:e8ea7db7408fbf416f9a21996b3d5846
EpicAccountId:e3fedbf987f34f68b31ac62fa312565e

Fatal error: [File:D:\build++UE5\Sync\Engine\Source\Runtime\Core\Private\Serialization\Archive.cpp] [Line: 795]
BulkData compressed header read error. This package may be corrupt!

UnrealEditor_Core
UnrealEditor_Core
UnrealEditor_CoreUObject
UnrealEditor_CoreUObject
UnrealEditor_CoreUObject
UnrealEditor_CoreUObject
UnrealEditor_CoreUObject
UnrealEditor_CoreUObject
UnrealEditor_UnrealEd
UnrealEditor_UnrealEd
UnrealEditor_Core
UnrealEditor
UnrealEditor
UnrealEditor_Core
UnrealEditor_Core
UnrealEditor_Core
UnrealEditor_Core
UnrealEditor_Core
UnrealEditor_Core
UnrealEditor_Core
kernel32
ntdll