Getting "HTTP/1.1 402 Payment Required" error

Hello!

Can you please help me - I am getting “HTTP/1.1 402 Payment Required” error when making Gemini API calls, despite having no outstanding payment balances or budget caps. My billing account is 0157BD-A2A61C-B699…

Was Gemini API (created in Google Cloud, not in AI Studio) also transited to prepayement?