Notice: file_get_contents(): Read of 12288 bytes failed with errno=21 Is a directory in /home/ubuntu/app/wiki/includes/registration/ExtensionRegistry.php on line 444

Fatal error: Uncaught InvalidArgumentException: /home/ubuntu/app/wiki/skins/HorizonWikiTest is not a valid JSON file. in /home/ubuntu/app/wiki/includes/registration/ExtensionRegistry.php:450 Stack trace: #0 /home/ubuntu/app/wiki/includes/registration/ExtensionRegistry.php(330): MediaWiki\Registration\ExtensionRegistry->readFromQueue() #1 /home/ubuntu/app/wiki/includes/Setup.php(293): MediaWiki\Registration\ExtensionRegistry->loadFromQueue() #2 /home/ubuntu/app/wiki/includes/WebStart.php(85): require_once('...') #3 /home/ubuntu/app/wiki/index.php(50): require('...') #4 {main} thrown in /home/ubuntu/app/wiki/includes/registration/ExtensionRegistry.php on line 450