Apple has pulled its latest iOS 9.3.2 update for the 9.7-inch iPad Pro due to a mysterious bug that has bricked some devices. “Error 56” asked users to plug their tablets into iTunes, but many found that this didn’t resolve the issue.

If you haven’t already updated your 9.7-inch iPad Pro to iOS 9.3.2, then you might want to wait. Some users are being plagued by a mysterious error that renders their device completely unusable after installing Apple’s latest software.