What happens when you try to switch user? Do you see any error message?
Yes, this is what I’m getting:
Screenshot
Sorry but without more info about the actual error I don’t know what to say. A “bad gateway” error is a generic one that doesn’t provide any info. Your best bet is to take a look in your PHP error logs for fatal errors, our of memory problems, etc, and try to find out if Cloudflare has more information about the actual error that occurred.
I’ll investigate this way and get back to you, thanks.
Just to let you know. I’m having the same problem.
This weird behavior started few days ago. I’ll try an old version to see if I have any insight about it.
Page Rules: see if applying “Bypass Cache” rule for wp-login.php helps this in any way?
Nginx error log says: [error] 49#49: *3242053 upstream sent too big header while reading response header from upstream
