Permissions list does not show an object until one has been created
From the forum: https://forum.mayan-edms.com/viewtopic.php?f=7&t=1614
It seems if you install a fresh blank Mayan and go to create a role, the role screen does not list all available objects.
For example Cabinets. On a blank install you will have "view cabinets" and "create cabinets" available in the role list, but after you've created your first cabinet only then "edit cabinets" and "delete cabinets" also appear.
IMO all permission objects should be available from the start so a permissions model can be built successfully without missing some.