Billing setup fails with OR_BACR2_59 – cannot create first billing account (Vietnam)

Hello Google Team,

I am unable to set up billing for Gemini API / Google AI Studio.

Error:
“Billing setup can’t be completed / Impossible de terminer la configuration de la facturation [OR_BACR2_59]”

Details:
- Project ID: gen-lang-client-09519403..
- Payments Profile ID: 9471-1291-82..
- Country: Vietnam
- Account type: Individual
- I am trying to create my first billing account (I have never had one before)
- Payment method: Standard Chartered card (works fine with Facebook Ads)
- The error appears immediately after clicking Submit

I have already tried different browsers and checked my address information.

Could someone from the Google team please help investigate this OR_BACR2_59 error?

Thank you.