MODX error, does not allow adding a page, what is the reason?

Question

PHP

Transferred from a test to a working domain, I can’t understand what is the reason? cannot create a new page, copies without problems
Fatal error: Cannot declare class ResourceCreateManagerController, because the name is already in use in /srv/users/serverpilot/apps/gaiautoru/public/manager/controllers/default/resource/create.class. php on line 0
file create.class.php

Answer 1

Crooked rights to folders or did not clear the cache. Deleting everything in the core/cache folder.
The most effective way to re-roll the installation in update mode

Answer 2

the first thing we do after the transfer is to redefine the rights, 755 for the folder, and 644 for the file, most of the problems are related to this