When querying the following endpoint and parameters: https://goerli.api.0x.org/swap/v1/quote?buyToken=0xeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee&sellAmount=1000000000000&sellToken=0x88D96a012a71f053041fe2BF27bC4703cebBB7b2

I get error like this:

 {
    "code": 100,
    "reason": "Validation Failed",
    "validationErrors": [
        {
            "field": "zippo",
            "code": 1010,
            "reason": "ZIPPO_CONTEXT_INVALID",
            "description": "Invalid zippo context"
        }
    ]
}

This endpoint is that I used before with the same params and it had worked well before. just I got the error from yesterday. I tested Mumbai endpoint too but it also returns the same error now.

Any help in understanding what is causing the issue would be helpful.