When updating the cache in Opencart 2.2 add-ons I get an error 500?

Question

opencart

Advise where, to dig and with what it can be connected. I also ask for help deciphering the logs.

2018-11-09 9:43:07 - PHP Warning:  DOMDocument::loadXML(): CData section not finished

    if ($this->config->get('aqe_status') && $this-> in Entity, line: 1689 in /var/www/www-root/data/www/мой сайт/admin/controller/extension/modification.php on line 139
2018-11-09 9:43:07 - PHP Warning:  DOMDocument::loadXML(): Premature end of data in tag add line 1684 in Entity, line: 1689 in /var/www/www-root/data/www/мой сайт/admin/controller/extension/modification.php on line 139
2018-11-09 9:43:07 - PHP Warning:  DOMDocument::loadXML(): Premature end of data in tag operation line 1680 in Entity, line: 1689 in /var/www/www-root/data/www/мой сайт/admin/controller/extension/modification.php on line 139
2018-11-09 9:43:07 - PHP Warning:  DOMDocument::loadXML(): Premature end of data in tag file line 1593 in Entity, line: 1689 in /var/www/www-root/data/www/мой сайт/admin/controller/extension/modification.php on line 139
2018-11-09 9:43:07 - PHP Warning:  DOMDocument::loadXML(): Premature end of data in tag modification line 2 in Entity, line: 1689 in /var/www/www-root/data/www/мой сайт/admin/controller/extension/modification.php on line 139
2018-11-09 9:43:07 - PHP Notice:  Trying to get property of non-object in /var/www/www-root/data/www/мой сайт/admin/controller/extension/modification.php on line 142

Answer 1

This means that these very additions change some system files that affect them in this way, or someone else replaced them earlier.
Try to chop off the Admin Quick Edit extension and clean it up again.