This issue appears to be because ArduinoISP sketch uses a function with the same name as the internal software serial Serial supplied with this core, getch () - this can be fixed easily (find/replace ...
I installed the library 0.2.1 in my Arduino IDE 2.0.0 but I've a message error when I verify the publisher.ino sketch: xrce_types.h:819:55: error: size of array 'data ...