Hello, everyone!
Recently (2 weeks ago exactly) the site had 3 users (administrator, administrator with limited rights and editor). Groups were created for all users, rights were registered, and everything worked.
Yesterday it turned out that all users have full administrator access!
I tried to reduce the rights of the user "administrator", but it still has full access to everything after changing. Moreover, I created a new user, did not assign him any rights, i logged in the admin panel through him - he has full access!
I made a backup of the site, deleted the database and files, downloaded the latest version of Modx (2.6), installed it (there were no errors during the installation), created a new user (besides the administrator), did not assign him any rights. I logged in - again full access to everything.
Apparently, the problem connect with some changes in the server (VPS).
Recently there were problems with the availability of the site (there were problems with updating the https-certificate in the ISP manager).
I asked the hosting provider to help. As a result, the hosting provider updated the ISP manager (version 5 remained the same) and the question was resolved. I do not know whether this is related to access problem or not. I did not change anything last 2 weeks (system settings or anything else).
I ask to help, I did not expect that on Modx something like this could happen ...