Deprecated: DownloadButton's extension.json or skin.json does not have manifest_version, this is deprecated since MediaWiki 1.29 in /var/www/html/includes/debug/MWDebug.php on line 377

Fatal error: Uncaught InvalidArgumentException: The value for 'LicenseName' should be an array (from /var/www/html/extensions/DownloadButton/extension.json) in /var/www/html/includes/registration/ExtensionProcessor.php:801 Stack trace: #0 /var/www/html/includes/registration/ExtensionProcessor.php(268): ExtensionProcessor->storeToArrayRecursive() #1 /var/www/html/includes/registration/ExtensionRegistry.php(421): ExtensionProcessor->extractInfo() #2 /var/www/html/includes/registration/ExtensionRegistry.php(255): ExtensionRegistry->readFromQueue() #3 /var/www/html/includes/Setup.php(252): ExtensionRegistry->loadFromQueue() #4 /var/www/html/includes/WebStart.php(93): require_once('...') #5 /var/www/html/index.php(44): require('...') #6 {main} thrown in /var/www/html/includes/registration/ExtensionProcessor.php on line 801