Octoprint System commands - jakebullet70/OctoTouchController GitHub Wiki
Setting SYSTEM permission in Octoprint. (OctoTouchController Version > V1.2.9)
To allow OctoTouchController to have access to the system command you need to add the system permission to the user.
Make sure the commands are setup here. If these are left blank the OctoTC menu will still show but buttons will be disabled.