Link to page for web updating - your_site_url/mw-config/index.php If your version older then 1.35 version, then firstly update to 1.35 version . Only after that update to 1.40 version. Otherwise, it can brake you data in DB. If you see 500 error after updating - check permissions for folders: cache, vendor, skins, includes . For changing permission use command: chmod -R 777 ./cache If you see another errors on the pages, try to update extensions . To fix Logo after updating: need to change $wgLogo to $wgLogos. Before: $wgLogo = "$wgScriptPath/resources/assets/logo.png"; After: $wgLogos = [ '1x' => "$wgScriptPath/resources/assets/logo.png", '1.5x' => "$wgScriptPath/resources/assets/logo.png", '2x' => "$wgScriptPath/resources/assets/logo.png", 'svg' => "$wgScriptPath/resources/assets/logo.png" ];
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