Hello! One of my client sites is giving me a 502 error when I try to log in at /wp-admin. The site looks ok from the front end. I cleared my browser cache and still get the same error (see below). I could use some suggestions on what might be causing this problem and how I can restore access to my WP admin dashboard.
Recent changes? Yesterday I updated the site to the current WP version and I pasted a code snippet into a Header/Footer code manager plugin for a Constant Contact form. However, that didn't seem to cause any problems while I was working on the site yesterday. I did not have trouble until today. Thanks for your help!
This is the error I get in browser when I try to login:
ERROR 502 - BAD GATEWAY
Why am I seeing this page?
The server that your request has reached is acting as a gateway or proxy to fulfil the request made by your client.
Web Browser => Web Front-End => Web Back-End
This server (Web Front-End) received an invalid response from an upstream (Web Back-End) server it accessed to fulfil the request.
In most cases this will not mean that the upstream server is down, but rather that the upstream server and the gateway/proxy do not agree on the protocol for exchanging data.
This problem is most commonly caused when there is a problem with IP communications between the Web Front and Back-Ends. Before you attempt to resolve this problem you should clear your browser cache completely.
Our support staff will be happy to assist you in resolving this issue. Please contact our Live Support or reply to any Tickets you may have received from our technicians for further assistance.