Serv7 Problems

There is a problem with Serv7. When I add PHP test intervals, it does not work. Why is the HTML active but the PHP files are not working?

Error 504
Request timeout
The server cannot fulfill your request due to the too long waiting time for the script to execute.

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It gives this error, by the way, PHP says the file is empty and only says test, but this is the error.

vanessa87 504 error means your code was executing too long. Check the script and try to optimize it.