Hi there, I have the same problem. Actually im running WordPress Version 4.6.1. with the UAM Plugin Version 1.2.7.4. Now when I edit a user (a new or even an older one) the checkboxes for the user groups are not shown anymore. Instead there occurs only the following message “Note: An administrator has always access to all posts/pages.”
Previously it worked fine but I can’t say exactly after which update the Problem occured.
The Webhosting is unchanged and running with PHP 5.6.
I hope somebody has an idea how to solve that or can provide a Workaround.
Thanks in advance, best regards and a wounderful Christmas time!
“Note: An administrator has always access to all posts/pages.” Means that the user is an administrator of the page. These users are have always full access. You should change the role of the user to a lower level.