You could try to remove the buttons and see if it activates or not.. If it does something else wrong. I had the same issue but I think that solved it for me..
A320_Throttle_Factory_Calibration_V1_1.pln (1.7 MB)
Included the calibration pdf because I can’t find it in the thread.. Rename .pln to .pdf and be sure to use the two red buttons on every indent.