(Solved) Tahoe-LAFS config error

Hi, I am having trouble setting up a Tahoe-LAFS config in duplicati.
The config assistant insists input a username when there is none for Tahoe-LAFS access.
If I put something for username then the connection fails with “Failed to connect: Unwrapped TargetInvocationException”

I tried to manually craft a config without username but it fails to with the same error.

I tried to config the Tahoe-LAFS client node but I don’t found any option for webport authentication.

The canary channel version of Duplicati works well with Tahoe-LAFS.