When CharacterAutoLoads is set to false, pressing various buttons on the controller will give the following errors
03:03:26.172 - CoreGui.RobloxGui.Modules.BackpackScript:207: attempt to index upvalue 'Humanoid' (a nil value)
03:03:26.172 - Stack Begin
03:03:26.172 - Script 'CoreGui.RobloxGui.Modules.BackpackScript', Line 207 - upvalue UnequipAllTools
03:03:26.173 - Script 'CoreGui.RobloxGui.Modules.BackpackScript', Line 984
03:03:26.173 - Stack End
03:03:26.173 - ContextActionService: Unexpected error while invoking callback: CoreGui.RobloxGui.Modules.BackpackScript:207: attempt to index upvalue 'Humanoid' (a nil value)
I am going to guess this also happens when there is no character at all, e.g. Player.Character:Destroy()
Edit: ButtonL1 and ButtonR1 cause this (press them quickly)