Fluent community issue?

Same problem here. I got this problem also a lot recently. Also with auto login links from email. I though this was an server issue because we migrated recently to Nginx server. I highered the PHP workers I though it was something related to this after some research. There are a lot of polling requesta going out from Fluent community this is also something I found out but did found a way to rate limit this yet.

Can you check your server's error log and share if you find the exact error so I can take a look.

PS: I have removed the screenshot as it had personal info.

The 502 Bad Gateway error you're seeing is actually a server-level issue, not a bug in the signed URL/auto-login
feature itself. The Cloudflare error page confirms this — it shows your origin server (community.crm.buzz) returning
a "Host Error," meaning the server is failing to respond properly.

The auto-login link format is correct and the code processes it fine. Here's what to check:

1. Check your PHP error logs
   Add this to your community site's wp-config.php if not already there:
   define('WP_DEBUG', true);
   define('WP_DEBUG_LOG', true);
   define('WP_DEBUG_DISPLAY', false);
   Then click the link again and check wp-content/debug.log for any fatal errors.

2. Plugin conflict on the community site
   When you click the auto-login link, the plugin logs you in and fires WordPress's wp_login action. If another plugin
   on your community site hooks into that action and crashes, it would cause a 502. Try temporarily deactivating other
   plugins on the community site and test the link again.

PS: Please reply to your ticket.