when I add any product by clicking the "Add to Cart" button the website redirects to the 503 error page, the error is: "Service Unavailable
The server is temporarily unable to service your request due to maintenance downtime or capacity problems. Please try again later.
Additionally, a 503 Service Unavailable error was encountered while trying to use an ErrorDocument to handle the request."
there is no maintenance file in the var or leading root directory.
how can I resolve this issue?
