Site Component Manager failed to install component %1 on server %2. The WebDAV server extension is either not installed or ...

%11Site Component Manager failed to install component %1 on server %2.

The WebDAV server extension is either not installed or not configured properly.
Solution: Make sure WebDAV is installed and enabled. Make sure there is an authoring rule that allow "All users" read access to "All content". Make sure the WebDAV settings "Allow anonymous property queries" and "Allow property queries with infinite depth" are set to "true" and "Allow Custom Properties" is set to false.%12%0