Hello there! Don't worry you didn't do anything wrong usually what this means is it’s a problem between servers on the internet. Basically, the server that handles the request (like Google or the website you’re trying to visit) didn’t get a response in time from another server it relies on. Reload the page – Sometimes it’s temporary. Press F5 or click the reload button. Restart your router/modem – Turn it off for 30 seconds and turn it back on. Clear Firefox cache – Go to Settings → Privacy & Security → Cookies and Site Data → Clear Data, then check Cached Web Content. Try later – Often, a 504 error is on the website’s side, not yours, so waiting 5–10 minutes and trying again may work. Hope this helps!!