Warning: Uncaught Exception: Warning: require(/var/www/html/pub/errors/503.php): failed to open stream: No such file or directory in /var/www/html/vendor/magento/framework/App/ExceptionHandler.php on line 171 in /var/www/html/vendor/magento/framework/App/ErrorHandler.php:61 Stack trace: #0 /var/www/html/vendor/magento/framework/App/ExceptionHandler.php(171): Magento\Framework\App\ErrorHandler->handler(2, 'require(/var/ww...', '/var/www/html/v...', 171, Array) #1 /var/www/html/vendor/magento/framework/App/ExceptionHandler.php(171): require() #2 /var/www/html/vendor/magento/framework/App/ExceptionHandler.php(71): Magento\Framework\App\ExceptionHandler->handleBootstrapErrors(Object(Magento\Framework\App\Bootstrap), Object(Exception), Object(Magento\Framework\App\Response\Http\Interceptor)) #3 /var/www/html/vendor/magento/framework/App/Http.php(156): Magento\Framework\App\ExceptionHandler->handle(Object(Magento\Framework\App\Bootstrap), Object(Exception), Object(Magento\Framework\App\Response\Http\Interceptor), Object(Mag in /var/www/html/vendor/magento/framework/App/ErrorHandler.php on line 61

Fatal error: Magento\Framework\App\ExceptionHandler::handleBootstrapErrors(): Failed opening required '/var/www/html/pub/errors/503.php' (include_path='/var/www/html/generated/code:/var/www/html/generated/code:/var/www/html/vendor/magento/zendframework1/library:.:/usr/share/php') in /var/www/html/vendor/magento/framework/App/ExceptionHandler.php on line 171