How to fix "No protocol handler was valid for the URL" in apache log.
In my case i had it when i was setting up facebook crawler for my page, and result was that FB was not able to include my page in FB post.
So the only thing what i had done was enabling mod_proxy_http in apache conf
In my case i had it when i was setting up facebook crawler for my page, and result was that FB was not able to include my page in FB post.
So the only thing what i had done was enabling mod_proxy_http in apache conf
LoadModule proxy_http_module modules/mod_proxy_http.so
and that was it!