Hello

A 502 bad gateway error means that web server that you have connected to is acting as a proxy for relaying information from another server ,which means one web server gets on invalid response from another web server.

It happens most of the time ,the problem is with website itself so there is nothing you can do much.

So to fix it

You can refresh the page

Check if the site is down for other people

Try another browser

Clear your browser's cache and cookies

Check your plugins and extensions

Restart your devices

Hope its helpful