MediaWiki is unable to load the extension Renameuser. Please check that the extension's name is correct and all of its files are properly installed.
Details:
Error reading /var/www/www.ccc-mannheim.de/mediawiki/extensions/Renameuser/extension.json
. filemtime(): stat failed for /var/www/www.ccc-mannheim.de/mediawiki/extensions/Renameuser/extension.json.
#0 /var/www/www.ccc-mannheim.de/mediawiki/includes/GlobalFunctions.php(54): ExtensionRegistry->queue() #1 /var/www/www.ccc-mannheim.de/mediawiki/LocalSettings.php(163): wfLoadExtension() #2 /var/www/www.ccc-mannheim.de/mediawiki/includes/Setup.php(212): require_once('/var/www/www.cc...') #3 /var/www/www.ccc-mannheim.de/mediawiki/includes/WebStart.php(92): require_once('/var/www/www.cc...') #4 /var/www/www.ccc-mannheim.de/mediawiki/index.php(44): require('/var/www/www.cc...') #5 {main}