@Johnh and @NiaMiteva,
Sorry for the frustration with ngrok. The short answer is the error message is correct:
Usage of ngrok requires a verified account and authtoken.
So you will need to sign-up for an ngrok account.
To reduce the confusion of many threads about the same topic, I’m asking the community to keep comments in NgrokError when using Forge Tunnel. I’m closing this thread to avoid confusion.