Manual sync request: "prepayment credits depleted" (429) + "Error during billing setup" — cannot configure prepayment on AI Studio Billing page

Gemini API
,
1

Hello,

I’m unable to use the Gemini API because my billing account appears to be stuck
in an inconsistent prepay state, and the AI Studio Billing page fails when I try
to configure prepayment. I believe this needs a manual sync on Google’s side,
similar to other threads in this forum.

Current state

  • Billing account ID: 00CC91-B5F582-70C..
  • Project: AUREO ONLINE (gen-lang-client-0958767..)
  • AI Studio Billing page shows the account as “Paid tier 1 · US$ 250 account
    level limit” with 1 project linked (AUREO ONLINE)
  • The same page shows: “No prepayment method has been configured for this
    billing account. Prepayment is required for this billing account.”
  • Clicking “Set up prepayment” immediately shows a toast error:
    “Error during billing setup” — the flow never opens.

API error (every key of the project, every model)

HTTP 429 RESOURCE_EXHAUSTED:
“Your prepayment credits are depleted. Please go to AI Studio at
https://ai.studio/projects to manage your project and billing.”

This happens on gemini-2.5-flash and gemini-2.5-flash-lite alike, with all API
keys belonging to this project.

What I already did

  1. Linked the project to my active billing account in Google Cloud Console
    (Billing → My projects shows AUREO ONLINE linked to this account).
  2. Purchased credits / made a payment through Google Cloud Console with a valid
    card (payment completed on the Cloud side).
  3. Waited ~24 hours for propagation — no change.
  4. Verified the payment method at pay.google.com (no pending verification).

Troubleshooting of the “Error during billing setup” page

The error is reproducible in every environment, so it is not a local issue:

  • Normal Chrome window, logged into the owner account
  • Incognito window
  • Installed AI Studio PWA
  • A different computer
  • All browser extensions disabled

DevTools console shows the embedded payment flow being blocked, e.g.:

Request

Could someone from the team manually sync the billing state of billing account
00CC91-B5F582-70CD.. / project gen-lang-client-09587675.., or enable the
prepayment setup so I can purchase credits? My production system depends on the
Gemini API and has been blocked since the account switched to the prepay flow.

Thank you!