You've gone offline. Attempting to reconnect

I get this error constantly now, after my 10.2 upgrade, often in the middle of doing work on the site or simply browsing.

ETA: My console is laden w/ "Failed to load resource: the server responded with a status of 403 (Forbidden)" and "socket.ashx/negotiate?(full URL elided)". I have 2 web servers. 

How is your environment configured? Do you have a load balancer?

Yes; AWS ALB. I also had a wild idea to check the license tab under site; it shows only 1 registered server (as it happens, a correct entry). We have 2 and our license permits up to 5.

The issue resolved above for 10.1 was to prevent this error for members that log out of one tab but have remaining tabs open. Is that what you're seeing?

That said, it shouldn't be license-related. As long as you're logged in, nothing in the platform should be returning a 403 from that endpoint. We have seen occasional issues before where proxy configuration would prevent web sockets, server-sent events, or long polling -- all automatically negotiated over socket.ashx.

This, along with your other thread do make we wonder if some broader issue may be at work here. I'd still recommend opening a support ticket to help more deeply analyze the upgrade and potentially review an HTTP trace. My apologies if you've already taken these steps.

We don't have a proxy, so I've opened a support case.

We don't have a proxy, so I've opened a support case.