How to correct "failed to load outer for resource"

So I just came back to programming my game ive been developing after a couple months (I hit a block and couldent figure out how to get around it) and I got these errors. These need to be fixed as its everything I have and I can’t remember what to do. I have seen other responses, and they say to delete the unreal 4.12 folder, but it requires admin permissions to do so (I am the admin) and It won’t let me delete it. I don’t know what to do to get around admin permissions. Any help would be appreciated.

I’m just running into this as well, updating a file to 4.24 (same thing happens in 4.23)