The server received an invalid response from another server it was
accessing while attempting to load the web page or fulfill another
request by the browser.
Why does it appear?
The reasons of this error are almost the same as for 502 error. The
difference is that unlike 502 error where the invalid response was
received from the server, the response was not received at all within a
specific time frame. Thus, the request timed out stating that server is
unavailable. It can also happen during the highest load peaks, where Apache is
not able to process the amount of requests and put them into a queue.
Since the error is in 90% of cases connected with the server
load, and all services are monitored, our support team will be notified
about the issue right away and is able to resolve it within 10-30
minutes. Other possible reason might be that the script in your account requires more time to execute than it is configured on the server by
default.
Solution:
Check our social media pages or
contact our support team to ensure the server is up and running. If the
server’s performance is normal, most probably one of your scripts
requires more time to execute. The solution for this case is to increase
PHP time limit for script execution. It can be done in the php.ini file
by increasing max_execution_time value. The
optimization of a script performance is the second way of fixing the
issue.