While using post-payment, 'Your prepayment credits are depleted'

Gemini API
1

I am using the Gemini API for post-payment, and I got the following error.

**
ClientError**: 429 RESOURCE_EXHAUSTED. {‘error’: {‘code’: 429, ‘message’: 'Your prepayment credits are depleted. Please go to AI Studio at https://ai.studio/projects to manage your project and billing. Learn more at https://ai.google.dev/gemini-api/docs/billing#prepay. ', ‘status’: ‘RESOURCE_EXHAUSTED’}}

2

It seems now you have to be in Tier 3 to be able to change back to Postpay.

https://ai.google.dev/gemini-api/docs/billing#postpay