Unreal Engine Log in crash

My Epic games Launcher was working fine until I tried to modify the plugins in my Unreal Engine 5.6 version because Quixel Bridge wasn’t working. After making these changes, the launcher crashed and wouldn’t open anymore.

I uninstalled Epic Games and deleted the EpicGamesLauncher folder.
When I relaunched the launcher as an administrator, it worked again — but every time I tried to log into my account, the launcher crashed.

Out of curiosity, I tried logging in with a brand-new account, and surprisingly it worked without any issues.

I’d like to understand why I can’t log in with my main account and if anyone else has experienced this problem.