Error starting GCP free trial despite 'Owner' role

I added the Project Billing Manager role for myself and still have the same issue. It doesn’t seem to be a role issue.

What is the exact error?

Did you use the same account earlier for free trial?

The error is in the main message screenshot and no I’ve used that account before

You have used that account before? It doesn’t qualify for more than once.

Sorry, I meant, I have not used that account before