Get Postion updated_at not working

I'm trying to get Postions after a given date. I have provided a date to the 'updated_at' query parameter. The date I tried was '2024-01-01' and many other dates. I have tried to do this through my python code, also through Postman application, and also through your online portal https://platform.humanity.com/reference/get-positions

This is the result I'm getting.

{
"status": 15,
"data": "Get Failed - Your GET request failed",
"error": "updated_at is not a valid date.",
"token": "23440a874073893713455aeab5ba12e6b9213709"
}

Please let me know if I'm doing something wrong or if there is an issue on your end.

Thanks... Steve.