[SalesForce] Live Agent chat window in salesforce communities

this happens when you have another Salesforce app open. Not sure why, but you can't open Live agent console app and any other App in your org at the same time. This is a real pain.

Make sure you close the rest of the apps, logout and login again. Open the app in another browser or incognito mode doesn't resolve the issue (I've already tried)

I've been looking for a solution, and there is nothing.

The configuration must be fine because the following day Live Agent started to work again.

I suspect user error... i.e. they weren't logged in, when they said they were.