Uh- so second question in one day, but I'm getting this error whenever I tap on a button in my app: 2020-07-21 11:16:55.487080-0400 TOTL[30898:13825525] *** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<TOTL.ViewController 0x7fcc6a30a140> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key facebookTapped.'

I've tried googling this and it seems people have had the problem before, but either I don't understand the solution whatsoever, or the solution they present doesn't work for me. Any ideas? Again, I'm a beginner, so apologies if I don't understand everything as much as I should.

This is likely missing @IBAction in your view controller class that is defined in Storyboard somewhere as action for button.