New installation on a web hosting - new folders not created

My provider is saying that creating a folder uses a call in the form

https://oc.runblogger.ru/remote.php/webdav/

The MKCOL method is used and it is not standard requiring WebDAV over HTTP. Is that correct? Is there a workaround? How the folders are created during installation and new user creation? That’s very strange that some code of the application can create folders while some core functionality isn’t working.

I found a workaround here HTTP methods MKCOL and DELETE return error 501 Not Implemented, but it does not work for me.