cant onboard a new node on the latest mystnode on windows x64

[mjonsson1986]

Describe the bug
trying to use the advanced onboarding
but i allways get the unhelpful error:
failed to register a node
authorization grant token not found

A clear and concise description of what the bug is.

To Reproduce
Steps to reproduce the behavior:

1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error

Expected behavior
A clear and concise description of what you expected to happen.

Screenshots
If applicable, add screenshots to help explain your problem.

Environment (please complete the following information):

• Node version: [e.g. 0.19.1]
• OS: [e.g. raspbian buster, debian 10]
• Desktop app version (if applicable): [e.g. 2.0.4]
• Docker (if applicable): specify docker version and image tag
• Your identity (if applicable): [e.g. 0xDb34233cf11Ac64a449144Ec8D8251268a4b168A]
• Payment (top-op) reference (if applicable): [e.g. 1118e94e-27fc-4fd2-b604-fd26008fb709]

Additional context
Add any other context about the problem here.