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HTTP Error 504: Gateway Timeout
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On the installed Commerce 2, a message started to appear:
HTTP Error 504: Gateway Timeout
The server, while acting as a gateway or proxy, did not receive a timely response from the upstream server it accessed in attempting to complete the request.
This mainly happens when I try to go to the "configuration" link.
I restored from a backup - everything was fixed.
But after enabling the "contact" module, the same issue occurred again.
Please advise, is there anything that can be done? (the site is on a server, not local)