I was killing epic games (couldn’t have killed unreal as it would never launch cus of the error) with task manager then just reopening epic games as admin and using the unreal launch button in the top right of epic games. After about 3x it worked then I tried closing everything again to see if it was a fluke or fixed, but this time I tried launching unreal through epic from the library section and got the error again so I repeated the process, kill epic through task manager, open epic as admin and launch with top right unreal button. And after that everything works now, including the library button.
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