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/Http.php on line 260 in /var/www/html/vendor/magento/framework/App/ErrorHandler.php:61 Stack trace: #0 /var/www/html/vendor/magento/framework/App/Http.php(260): Magento\Framework\App\ErrorHandler->handler(2, 'require(/var/ww...', '/var/www/html/v...', 260, Array) #1 /var/www/html/vendor/magento/framework/App/Http.php(260): require() #2 /var/www/html/vendor/magento/framework/App/Http.php(157): Magento\Framework\App\Http->handleBootstrapErrors(Object(Magento\Framework\App\Bootstrap), Object(Exception)) #3 /var/www/html/vendor/magento/framework/Interception/Interceptor.php(58): Magento\Framework\App\Http->catchException(Object(Magento\Framework\App\Bootstrap), Object(Exception)) #4 /var/www/html/vendor/magento/framework/Interception/Interceptor.php(138): Magento\Framework\App\Http\Interceptor->___callParent('catchException', Array) #5 /var/www/html in /var/www/html/vendor/magento/framework/App/ErrorHandler.php on line 61

Fatal error: Magento\Framework\App\Http::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:.') in /var/www/html/vendor/magento/framework/App/Http.php on line 260