Null Exception Error trying to right click the wallpaper tool into my hot bar

Exception (cs:133099): NullReferenceException: Object reference not set to an instance of an object.
WallpaperPlanner.OnFrameWhileHeld () (at <00000000000000000000000000000000>:0)
BasePlayer.%594771b2203e358f3397539bd3cd787ecff23ebd () (at <00000000000000000000000000000000>:0)
BasePlayer.ClientUpdateLocalPlayer (System.Single %f43cb5ea827c7cda1015a2b581d912daec0677e0) (at <00000000000000000000000000000000>:0)
BasePlayer.%bb750e81671ff00c8b189aeb6901acb6d79f2338 (System.Single %f43cb5ea827c7cda1015a2b581d912daec0677e0) (at <00000000000000000000000000000000>:0)
Client.Update () (at <00000000000000000000000000000000>:0)