ok, we see in the screenshot "alarm: range"

this means the KHD started to measure but it took too long to come to a reasonable measurement value

when does this happen?

a) reagent doesn't reach the KHD - check if reagent is pumped into the KHD during measuring and that there is no air pumped

b) dosing calibration values are incorrect, in this case KHD is not able to calculate correct amounts resp. a correct KH value - check if calibration and settings of all 3 KHD involved pumps are correct
post screenshots of these 3 pumps here