Unable to execute dev tunnel operation 'create'. Tunnel service returned status code: 403 Forbidden

[ashlytom]

Describe the bug
I am unable to run the debug operation in Teams toolkit. I have create a testing account for running debug code. The account has custom app upload capability. But im getting this error constantly. It has only started recently, I had tried the same a month back and it was working fine.

Summary:

(×) Error: Unable to execute dev tunnel operation 'create'. Tunnel service returned status code: 403 Forbidden

Visit https://aka.ms/teamsfx-local-tunnel-task to learn more about 'Start local tunnel' task.

[2024-04-03T06:38:17.984Z] [Error] - code:Ext.DevTunnelOperationError, message: Unable to execute dev tunnel operation 'create'. Tunnel service returned status code: 403 Forbidden
Help link: https://aka.ms/teamsfx-local-tunnel-task

To Reproduce
Steps to reproduce the behavior:

1. Go to 'Local Debug(Chrome)'
2. Once the prerequiste tests are run, the dev tunnel service starts
3. Error happens

Expected behavior
Tunnel should be automatically relates and Dev Teams should open up browser

Screenshots

VS Code Extension Information (please complete the following information):

• OS: Windows 10 pro OS Build: 19045.4046
• Version : February 2024 (version 1.87)

CLI Information (please complete the following information):

• OS: not installed
• Version : not installed

Additional context
Add any other context about the problem here.

[XiaofuHuang]

@ashlytom
Could you try to initiate the dev tunnel CLI? Did this issue occur when you used the dev tunnel CLI directly?

• Install dev tunnel cli.
• Login with your M365 Account using the command devtunnel user login.
• Start your local tunnel service by running the command devtunnel host -p 3978 --protocol http --allow-anonymous.
• In the env/.env.local file, fill in the values for BOT_DOMAIN and BOT_ENDPOINT with your dev tunnel URL.

  BOT_DOMAIN=sample-id-3978.devtunnels.ms
  BOT_ENDPOINT=https://sample-id-3978.devtunnels.ms/
  

• Remove "Start local tunnel" task in tasks.json
• Press F5 to start again

[ashlytom]

@XiaofuHuang
Yes, the issue is happenning even after using the dev tunnel. Still getting the same error message.

[XiaofuHuang]

@ashlytom Are you using any proxy server? If so, here is a possible solution.

[ashlytom]

No @XiaofuHuang.
There is no proxy server involved here. I think there is something wrong with the ngrok binary package. Is there a way to test it?

[XiaofuHuang]

@ashlytom We've used the dev tunnel instead of ngrok in Teams Toolkit V5. Given that the dev tunnel CLI isn't functioning in your environment, it's likely the root cause lies within the dev tunnel.
This issue has been copied over to dev tunnel repo here: microsoft/dev-tunnels#436

[ashlytom]

@XiaofuHuang Thank you. It was an issue caused due to the firewall on the system i was working with. Once the API within devtunnel host was whitelisted, it started working again.