I've been dealing with the exact same issue for almost two weeks now, it's mind-blowing how silly of an issue this is but it was unfortunately my very last straw with apple. After reading a dozen or so articles and talking to three different customer service reps, the first two were nice but unable to help solve the issue. The third one, a very snarky teenage sounding male, had me delete my full hard drive, which still didn't fix the problem.
I couldn't take it anymore and chose to hang up and do something I've been thinking about more and more recently... switching to Windows! Talked to some friends and gathered the parts and I am happy to say I am writing this, my farewell to Apple, safe and sound from a Windows PC and I couldn't be happier about it.
From apples OEM everything to their overly structured repair process (that still somehow always results in an hour long process, not to mention the $600 repair fee for a cracked MacBook screen) an android is looking better than ever.