Fatal error: Uncaught Exception: /var/www/html/extensions/AddEvent/extension.json: unsupported manifest_version: 2 in /var/www/html/includes/registration/ExtensionRegistry.php:196 Stack trace: #0 /var/www/html/includes/registration/ExtensionRegistry.php(138): ExtensionRegistry->readFromQueue(Array) #1 /var/www/html/includes/Setup.php(40): ExtensionRegistry->loadFromQueue() #2 /var/www/html/includes/WebStart.php(137): require_once('/var/www/html/i...') #3 /var/www/html/index.php(40): require('/var/www/html/i...') #4 {main} thrown in /var/www/html/includes/registration/ExtensionRegistry.php on line 196