Stuck on "loading" for hours

I am currently talking the course “Rapid Application Development with Large Language Models (LLMs)”. The course launched has been stuck on “loading” for several hours now. Previously, the notebook managed to launch but crashed a few minutes after launching (connection to jupyter kernel lost). I have ran the websocket tests, ran in incognito mode, chrome/firefox etc. I have also raised a ticket on the DLI support page but no resolution thus far..