How to fix the problem when the MODX Revolution admin panel does not see resources / elements / files?

Question

CMS

Good afternoon.
When you log in, a blank main screen appears (see screenshot). Sometimes the screen appears when trying to open certain resources.
It is known that the problem occurs in the latest versions of Chrome and Opera browsers, but not on all computers (Windows 7 OS). It was not possible to find out the regularity of the appearance of the error. The same PC, OS and browsers, but one works, but the neighbor does not.
The problem occurred in parallel on several sites on MODX Revolution version 2.2.7-pl, hosted on different servers. Before the problem occurred, no changes were made to the server or CMS settings.
First occurrence of the problem: September 25-26.

Answer 1

The problem occurs due to .js compression
habrahabr.ru/post/151508

Answer 2

Try to login with www and without www. It will help
Turn off JS compression, as written above

Answer 3

This is still possible due to the wrong path in the config in the connectors folder.