Assertion failed: IsValid() [File:D:\build++UE5\Sync\Engine\Source\Runtime\Core\Public\Templates*SharedPointer*.h]
Ah, reminds me of my days of coding in C++.
There’s a broken reference and/or a necessary file is missing or has been renamed or corrupted.
It’s ALSO possible that you’re missing a component that is used TO READ the file. Yes, very convoluted, I know.
Try reverifying Unreal Engine or reinstalling it.
To reverify:
Further reading if these don’t work; people tried all sorts of things: