AIM: "Failed to load data:" inside Charcoal HQ chat

[scarletcs]

Recently whenever I first load the Charcoal HQ chat room, if I have the Autoflagging Information & More userscript enabled, I get this message appearing at the top of the chat window.

Notably, nothing about what failed to load. That's the whole popover.

This is my browser console (Chrome 58, Windows 10) just after Charcoal HQ finishes loading:

The error in the console there shows up before the popover does.

[scarletcs]

CalvT suggested that this issue may be caused by the same question being reported more than once.

I can confirm that now that the transcript's moved on, the same error doesn't occur.

[j-f1]

@jdahobbs If this occurs again, can you paste the failing URL from the console into a comment?

[CalvT]

I often get this on loading the Charcoal chat, a refresh fixes it. The error message I got this morning was:

WebSocket connection to 'wss://metasmoke.erwaysoftware.com/cable' failed: WebSocket is closed before the connection is established.

[scarletcs]

@CalvT At the time I reported this, I was able to refresh and reliably see this message show up on every single refresh.