Update from 8.3.7 to 8.4.4

Just updated from 8.3.7 to 8.4.4.  Everything went fine except that at the end got this error.  An AJAX HTTP error occurred. HTTP Result Code: 200 Debugging information follows. Path: /update.php/start?id=5927&op=do_nojs&op=do StatusText: parsererror ResponseText: Recoverable fatal error: Argument 1 passed to DrupalCoreEntityEntityStorageBase::loadMultiple() must be of[…]