407 "Proxy Authentication Required" Custom UI and Tunnel after NGrok changes

Hi,

I am picking up a Forge Custom UI app that I paused development on more than a year ago.

When my index.js tries to do a fetch “asApp” when I am using tunnelling to debug. I get a 407 “Proxy Authentication Required”
I am doing a simple GET to get an issue.

this only happens when I user forge tunnel. Is NGrok not proxying the call?
Is this anything to do with the NGrok changes?
I can not find any help?

Please help!?

Thanks

Yes there have been changes from ngrok ,
you can refer to the changes here