Fatal error: Uncaught MediaWiki\Config\ConfigException: Math extension can not find Restbase URL. Please specify $wgMathFullRestbaseURL. in /var/www/html/extensions/Math/src/Hooks.php:48 Stack trace: #0 /var/www/html/includes/registration/ExtensionRegistry.php(587): MediaWiki\Extension\Math\Hooks::onConfig(Array, Object(MediaWiki\Settings\SettingsBuilder)) #1 /var/www/html/includes/registration/ExtensionRegistry.php(333): MediaWiki\Registration\ExtensionRegistry->exportExtractedData(Array) #2 /var/www/html/includes/Setup.php(293): MediaWiki\Registration\ExtensionRegistry->loadFromQueue() #3 /var/www/html/includes/WebStart.php(85): require_once('/var/www/html/i...') #4 /var/www/html/index.php(50): require('/var/www/html/i...') #5 {main} thrown in /var/www/html/extensions/Math/src/Hooks.php on line 48