When there is an error 504 gateway timeout on your website the error message does not tell much about this. It only indicates what is exactly happening to your website so the troubleshooting gets very challenging for you. When this error occurs this simply means that the web server on which your website is being hosted was not able to receive the response from another server on time.
A 504 Gateway Timeout error blunder shows that the web worker is standing by excessively long for a reaction from another worker and "timing out."
There can be numerous purposes behind this break: the other worker isn't working appropriately, it's over-burden, or it's down.Read More: https://www.wewpyou.com/504-gateway-timeout-error/
When there is an error 504 gateway timeout on your website the error message does not tell much about this.
It only indicates what is exactly happening to your website so the troubleshooting gets very challenging for you.
When this error occurs this simply means that the web server on which your website is being hosted was not able to receive the response from another server on time.
It happens when the server attempts to load any web page.
you can do this just by pressing the F5.
And if not you will see a refresh button on the top of your page, near the address bar.