Can not working with Sandbox

Hi there.
I have got an error with sand box. I used your apis in https://documenter.getpostman.com/view/18831016/UVsEWpoM.
There are an error when I tried to call your api

{
"ErrorMessage": "Requests to the instance RDC CE Sandbox cannot be processed by this URI",
"ErrorCode": "DATABASE_VERSION_MISMATCH",
"TimeStamp": "2022-08-08T03:51:24.3950568Z"
}

How can I deal with that error ?
Thanks