Icon on the device indicates that a N/A action is assigned, but it does not do anything?
Each action that has been assigned to the profile reserves that specific button or dial position. An assigned action always has a link between the mapped position ("the button") and the "action on the action panel".
In some cases the action on the action panel goes "missing": The target application no longer has that functionality, the functionality has been significantly changed/upgraded, or it has been deleted for some reason.
When this happens, but the action was already mapped to the profile, the link is lost (but the button is still reserved for that action): Loupedeck system indicates that the action mapped to this position is N/A, Not Available.
This action can be removed normally or just replaced by dragging another action over it.
Note: Usually this happens with "Activate Aplication" actions. If user uninstalls the application from the computer, the action for launching it still remains mapped on the profile.