Why does one of my pinned actions appear disabled?

A pinned action appears grayed out and cannot be opened if it is no longer available to you. In Quick Actions settings, it appears as Disabled, and its shortcut no longer works. Hover over the action to find out why:

Message	Reason	Solution
You do not have permission to access this action	Your permissions do not allow you to access this action.	Ask your system administrator to grant you the required permission through Employee Roles.
This feature is not active	The application associated with this action is not active.	Activate the application from Apps Manager.
This page is no longer available	The page no longer exists in the system.	Remove the pinned action.