'Timestamp for this request is outside of the recvWindow' Error

We check the API time using GET / api/v3/time, and the time is identical to our server time up to hundredths of a second, but we still get this error. On the server time is synchronized via ntp. Why is this happening?

By default the API server allows a 5s time window, starting from the client’s timestamp. Please try to increase the recvWindow and see if that can reduce this error.