Tunnel not found error Pyngrok streamlit collab

I am the developer of pyngrok, and I wanted to reach out to let you know that I’ve seen reports of this pop up on our issue tracker, several on here, on Colab’s issue tracker, etc. a lot in the last week. I reached out to ngrok, as that appeared to be where the issue was, and they just got back to me. They confirmed that they had inadvertently started blocking connections to Colab recently, and they have now fixed this. I just tested this again myself as well, and sure enough, it’s fixed!

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