Yep, I called that self.items.remove(at: index). I even use now the downloaded app from the project, with pod updated and all, and behaves the same, I'm puzzeled. The bug is here when running on my mac because you get no bugs i see. Hopefully, other students could confirm that is working on their machine maybe.
the error i'm getting is acctually this:
fullstacksocial_ios_lbta[2300:98770] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Invalid update: invalid number of items in section 0. The number of items contained in an existing section after the update (1) must be equal to the number of items contained in that section before the update (1), plus or minus the number of items inserted or deleted from that section (0 inserted, 1 deleted) and plus or minus the number of items moved into or out of that section (0 moved in, 0 moved out).'