Using gemini (OpenAI compatible) don't work - "missing field `message`"

[dhnam]

As title suggests, using Gemini with OPENAI_PROXY_BASE don't work with JSONDeserialize error "Missing field `message`".

It looks like Gemini doesn't support some OpenAI feature with its OpenAI compatible API, thus giving the error.

I tried giving request to Gemini API, and this was the response.

[
  {
    "error": {
      "code": 400,
      "message": "Invalid JSON payload received. Unknown name \"web_search_options\": Cannot find field.",
      "status": "INVALID_ARGUMENT",
      "details": [
        {
          "@type": "type.googleapis.com/google.rpc.BadRequest",
          "fieldViolations": [
            {
              "description": "Invalid JSON payload received. Unknown name \"web_search_options\": Cannot find field."
            }
          ]
        }
      ]
    }
  }
]