Hi, I have similar problem, not the same.Cura show my extruder temp as 0º and I check with another program PronterFace and says 16º of extruder temp.
So, in Cura 3.2.1 it doesn't start to print, always stay in "printing 0%".In older Cura, I printed normally yesterday, with the same machine.I cancel the print, and I can move correctly X, Z & Y axis... I tried to do it many times and it doesn't work.Can you help me please? THANK YOU VERY MUCH