Translations:Manual:$wgForeignFileRepos/80/en

The solution is to use HTTPS in the URLs pointing to the commons repository! If you use instant commons with the default setup as it comes from DefaultSettings.php, this issue will automatically be fixed by using MediaWiki 1.25.2 or newer. If you in contrast have defined $wgForeignFileRepos in LocalSettings.php, the URLs set there have to be adjusted accordingly!