Whenever you see 502 bad gateway error while loading the Gmail website. Simply, clear the browser cache and update it. it will start working fine on your device. here are the guide to clear the cookies and cache data for google chrome browser.
- Open the browser
- Type chrome://history in the url box and press enter button
- Now click on the delete browsing data option.
- Select all browsing data and time frame should be all time
- Click on the clear data button.
That’s it once you will clear the browsing data, you may go ahead and reload the Gmail website. It should be working fine. if it is still not working, please let me know. I will suggest you some more quick guides.