502 Bad Gateway on Nginx if I use some browsers

– 502 Bad Gateway is likely a server error, not a WordPress issue. Try contacting your hosting provider.
– Meanwhile, try clearing your cookies, cache. Also, try a different browser.

Hi t-p, thanks for your reply but you’ll note from my original post that I am aware of these, and have done your second suggestion (though I didn’t mention clearing the cache).

What I want to know is if anyone else has encountered this quirk as there is no logical reason Cyberfox (Firefox-based) will encounter 502 while Firefox itself doesn’t.

But of course there must be a reason for it if it keeps happening.

For various reasons which I won’t go in here, I cannot presently contact my hosting provider.

This may help others, as I got back in.

I was trying to access lucire.com/insider/wp-admin.

On Firefox, I get there. However, on Cyberfox, I was being redirected to:

https://lucire.com/insider/wp-login.php?redirect_to=http%3A%2F%2Flucire.com%2Finsider%2Fwp-admin%2F&reauth=1

The redirect is what screwed things up, though I have no idea why Cyberfox would redirect and Firefox doesn’t.

I altered the URL manually to:

https://lucire.com/insider/wp-login.php?redirect_to=http%3A%2F%2Flucire.com%2Finsider%2Fwp-admin

and got the log-in screen again.

Thanks for sharing, @jack-yan.