Fatal error: Uncaught UnexpectedValueException: callback 'UniversalLanguageSelector\Hooks::setVersionConstant' is not callable in /home/clients/909f41deb1ff2f5b113d813c22595ed2/sites/help.biolovision.net/includes/registration/ExtensionRegistry.php:584 Stack trace: #0 /home/clients/909f41deb1ff2f5b113d813c22595ed2/sites/help.biolovision.net/includes/registration/ExtensionRegistry.php(332): MediaWiki\Registration\ExtensionRegistry->exportExtractedData(Array) #1 /home/clients/909f41deb1ff2f5b113d813c22595ed2/sites/help.biolovision.net/includes/Setup.php(280): MediaWiki\Registration\ExtensionRegistry->loadFromQueue() #2 /home/clients/909f41deb1ff2f5b113d813c22595ed2/sites/help.biolovision.net/includes/WebStart.php(72): require_once('/home/clients/9...') #3 /home/clients/909f41deb1ff2f5b113d813c22595ed2/sites/help.biolovision.net/index.php(36): require('/home/clients/9...') #4 {main} thrown in /home/clients/909f41deb1ff2f5b113d813c22595ed2/sites/help.biolovision.net/includes/registration/ExtensionRegistry.php on line 584