403 PERMISSION_DENIED — paid project locked despite billing enabled

Hi team,

Requesting a review of my Gemini API project access. Billing is fully configured (Paid Tier 1, prepaid credits loaded) but every `generateContent` call returns 403:

```json

{

“error”: {

“code”: 403,

“message”: “Your project has been denied access. Please contact support.”,

“status”: “PERMISSION_DENIED”

}

}

```

AI Studio shows: **“Project quota tier unavailable. Please contact your project administrator for assistance.”**

Region: United States. Successful API calls landed May 13-14 (used a portion of credits) before access was revoked. No configuration changed since.

Use case: personal experimental project — image generation via `gemini-3-pro-image-preview`. Standard text-to-image with reference conditioning, single-developer machine, fully within content policy.

Happy to share project ID via DM once a Google staffer can take a look. Thanks.

Sorry to hear about this. We’re treating this as a potential bug in Gemini API. Could you please enter the details of projects receiving unexpected 403 errors into this form?