Assertion failed: IsValid() [File:d:\build\++portal+release-live+compile\sync\engine\source\runtime\core\public\Templates/SharedPointer.h] [Line: 851]

[SlurpyIsADev]

For anyone here in 2025 or beyond, I fixed it by going to my “ProgramData” folder and deleting the folder called “Epic”. After that, it opened just fine. I don’t know the consequences of deleting the folder but I do know that it can fix the launcher.