This error is a Unispef error meaning black trap dianostic failed.
To determine whether is hardware or software problem try running: Terminal program located in ColorTools folder.
Choose File, Open, click on MC90.TRM
Pick : Settings, Communications. Verify settings are: 19200 baud, 1 stop bit, no parity, none flow control.
On buttons, click on: * then on Capabilities. (write down the string)
Click on *: then on Measure.
Does it have a valid measurement? Or any measurement?
You can measure black trap here with measure button and
see if it is normal, and also check white tile. If its zeroes, it’s a hardware problem.