Snapshot of MediaWiki extensions aren't downloaded with message "Invalid response from Extension Distributor remote client." at mediawiki.org.
It may be used Git (not SVN).
Also ExtensionDistributor Extension is displayed title "<You are downloading the <b>$ExtensionName</b> extension. Select your MediaWiki version. Most extensions work across multiple versions of MediaWiki, so if your MediaWiki version is not here, or if you have a need for the latest extension features, try using the current version.>".
Version: unspecified
Severity: normal