RESOURCE_EXHAUSTED error on gemini api, but I haven't used any resouce.

[remind]

I used the curl restful api of the gemini api free tier.curl 

https://generativelanguage.googleapis.com/v1/models/gemini-2.0-flash:generateContent" 

and the response is 

{
  "error": {
    "code": 429,
    "message": "Quota exceeded for quota metric 'Generate Content API requests per minute' and limit 'GenerateContent request limit per minute for a region' of service 'generativelanguage.googleapis.com' for consumer 'project_number:1048300423651'.",
    "status": "RESOURCE_EXHAUSTED",
    "details": [
      {
        "@type": "type.googleapis.com/google.rpc.ErrorInfo",
        "reason": "RATE_LIMIT_EXCEEDED",
        "domain": "googleapis.com",
        "metadata": {
          "consumer": "projects/1048300423651",
          "quota_limit_value": "0",
          "quota_metric": "generativelanguage.googleapis.com/generate_content_requests",
          "service": "generativelanguage.googleapis.com",
          "quota_location": "us-south1",
          "quota_unit": "1/min/{project}/{region}",
          "quota_limit": "GenerateContentRequestsPerMinutePerProjectPerRegion"
        }
      },
      {
        "@type": "type.googleapis.com/google.rpc.Help",
        "links": [
          {
            "description": "Request a higher quota limit.",
            "url": "https://cloud.google.com/docs/quotas/help/request_increase"
          }
        ]
      }
    ]
  }
}

 But I haven't used any api resource, it failed every time. And the used resources showed in console is zero.

What should I do to figure out the reason?