Struggling to reprogram replacement parts

I have just done a battery swap and screen replacement on my partners 13 mini. I bought an iCopy plus 2.2 to reprogram the display and battery however I don't seem to be able to write to either of the parts. It struggles to read the display information tending to time out before it has finished and while I can read the battery information for both the old and the new I cannot write it to the new battery? Is there something that I am missing? Thank you