OR_BACR2_44 when enabling Gemini API billing despite active Payments Profile

Hello,

I am unable to enable billing for Gemini API in Google AI Studio.

Error received:
“Billing setup can’t be completed. This action couldn’t be completed. [OR_BACR2_44]”

Details:

  • Project ID: gen-lang-client-03297084.. (Default Gemini Project)

  • I have an active Google Payments Profile.

  • I have a valid payment method attached.

  • Billing setup fails immediately after clicking Submit.

  • No Cloud Billing Account is created.

  • Google Payments support directed me to Google Cloud Billing support.

  • Google Cloud Billing support says I am not an administrator on any Billing Account, but I cannot become an administrator because billing account creation itself is failing.

Additional information:

  • I have multiple Google Payments Profiles (UK, US, India, and Nepal).

  • I am currently located in India.

  • I previously attempted billing setup while connected to a UK VPN.

  • I also tried using my UK Payments Profile and payment method, but the error remains.

Could someone please explain what OR_BACR2_44 means and advise how I can successfully create and link a billing account for Gemini API?

Screenshots of the error and Payments Profile are attached.

Thank you.