Notebook problem

While trying to run the notebook for “Building your first AI agent“ I got the following message on the screenshot. Does any of you knows how to solve this?

Hi @pmfopedrosa. I don’t I have encountered this message before, but I’m guessing it might have something to do with the session timing out. What happens if you close the pop up? If possible, try downloading the notebook in case there’s anything unsaved, and then refresh the page

Had you left the lab open but untouched for some length of time?

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Hello @magdalena.bouza and @TMosh, thank you! It may very well be case of session time out since returning to the course solved the problem. Still, it was interesting to see that when that problem popped up restarting the kernel did not help…

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It seems that Juypter Labs have some unfortunate quirks.

Oh yes, when I said refresh I meant refresh your browser, restarting the kernel does nothing. My guess is that the session where the lab is hosted ended, so restarting kernel does nothing since what you need to refresh is the lab session.