OC9 CSRF error
PUT http://localhost:8080/remote.php/webdav/bulkupload/...: 401 Unauthorized
<d:error xmlns:d="DAV:" xmlns:s="http://sabredav.org/ns">
<s:exception>Sabre\DAV\Exception\NotAuthenticated</s:exception>
<s:message>CSRF check not passed.</s:message>
</d:error>