Updated to version Modx 3.
The site has a news section, examples of work, employees, etc.
Everything is displayed through Collection 4.0.0. Error 503 occurs when you go to the page of the full material. Pictures for the materials are displayed through the additional TV img field.
<img src="[[*img:phpthumbon=`w=540&h=480zc=1`]]" alt="[[*pagetitle]]">
If you disable the additional img field, then the page of the full material opens normally. If enabled then error 503