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