User [email protected] looks like doesn't have permissions.
On trying to perform operations on the inventory using the administrator account, all or some of the options are grayed out.
The SSO Administrator account still being member of the Administrators group and have permission to perform operations in the other parts of vSphere Web Client including the Menu > Administration > Single Sign On > Users and Groups.
User Administrator cannot change the permissions of the object nor of the parent (options are grayed out).
Overall usage of vCenter is normal, all services starting, no errors reported.
vSphere Web Client
vCenter Server all versions.
The role of the administrator account got manually changed on the object or in the parent objects including on the vCenter level.
The roles of the users follow the more restrictive, for instance:
User Administrator is member of the Administrators group which still associated to the Administrator role.
But the user Administrator has been associated to the role "Read-Only" in the vCenter level.
Sample: