Thread:Project:Support desk/Upgrading 1.19 to 1.21.1/reply

that's my mistake.

i've enabled $wgUrlProtocols = array_merge($wgUrlProtocols, array('file:', 'ssh://'));

i rewrite it to $wgUrlProtocols = array_merge($wgUrlProtocols, array('file://', 'ssh://')); and all start working fine.