No access to box

Hello. The question is not related to any specific application ... But since. it is required to choose something to create a question, then they chose the first one that came across. But the problem seems to be some kind of system failure. We have boxing on our server. But something happened and there is no access to boxing. We contacted server support. They checked and said there is no problem on their side: "We do not see any problems from the server side, in the logs of your application: [2021-12-17 10:48:53] host: sauda24crm.com url: /api/contact-update/json/ point: /shop.starter.php data: Array ( [type] => 1 [message] => Uncaught Error: Class 'Xplatform' not found in /var/www/sauda24crmonebo/web1/web/api/system/Platform.class.php:10 Stack trace: #0 /var/www/sauda24crmonebo/web1/web/packages/PackageLoader/PackageLoader.class.php(69): include_once() #1 [internal function]: PackageLoader->loadClass() #2 /var/www/sauda24crmonebo/web1/web/api/services/SettingServi