Makermade M2 Precision Calibration

Edge calibration to 1.5mm. Precision calibration, the software times out, and the values are not updated. Error - "server not communicating’, however program is on an independent laptop.

As the offset is 25.4mm from the edges, perhaps the values are too large?

Should I be entering the nominal measurement or the product of the nominal minus the offset?

I reached out makermade but so far no resolve.
Anyone want to take a swing at this?
Thx