Billing setup fails with OR_BACR2_46 (upgrading Gemini API to paid tier)

Hi, I’m trying to upgrade my Gemini API project (Default Gemini Project) from Free Tier to Paid Tier in Google AI Studio, but billing setup keeps failing at the final step with:

“This action couldn’t be completed. Try again with a different, supported payment method. [OR_BACR2_46]”

What I’ve already tried:

  • Using a Visa debit card from an Indonesian digital bank (Bank Jago), with international payments and online transactions explicitly enabled in the card settings
  • Sufficient balance in the linked account
  • Aligned the name on my Google Payments Profile to match my government ID (previously mismatched, now fixed) — same error persists
  • Confirmed the card works for other international online services (successfully used to purchase an Anthropic API key)

I also tried to open a Cloud Support technical case for this, but I’m told I don’t have permission to file a technical case since my project doesn’t have a paid Support plan — which I obviously can’t get without billing working in the first place.

Has anyone experienced this specific error code (OR_BACR2_46) and found a resolution? I saw other threads about OR_BACR2_44 with similar symptoms but no confirmed fix.

Project ID: gen-lang-client-00343631..