@Ivan I tried again after a week and got a working subscription. I guess google just wasn't ready to release it yet.
@lehphyro Can you go to your order history page and see what it says there? Do you see anything related to Stadia Pro sub, and if yes, what's the status?
Also, I'm still not 100% sure where the problem is. Can you post a screenshot the error you're getting when you try to activate your Pro subscription?
If anything, you can also try to reach out to Stadia support and see if they can help you out
Go to the link below:
https://support.google.com/stadia#topic=9634925
On top right, click on 'Contact Us' > then request chat/callback to speak to a representative. Try it from a computer browser if the option is not shown on mobile
@Ivan I tried again after a week and got a working subscription. I guess google just wasn't ready to release it yet.