Locked out from Epic Games Launcher after adding Plugin to fresh install of UE 5.6

Same for me:

Assertion failed: IsValid() [File:D:\build++Portal\Sync\Engine\Source\Runtime\Core\Public\Templates/SharedPointer.h] [Line: 890]

EpicGamesLauncher
kernel32
ntdll

Just crashes, wont let me open the launcher.

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