tried debug:
kees@audiopc:~/Downloads$ sudo ./installJRMC --mcversion 28.0.110 --debug
Debug: Running: main --mcversion 28.0.110 --debug
Debug: Running: init
Starting installJRMC
Debug: Detected host platform: debian 12 amd64
Debug: Using host platform: debian 12
Debug: Running: parseInput
Debug: Debugging on
Debug: installJRMC version: 1.0-rc11
Debug: Running: setMCVersion
Using MC version 28.0.110 determined by user input
Debug: MVERSION: 28, MC_VERSION: 28.0.110, MC_PKG: mediacenter28=28.0.110, MC_RPM: /home/kees/Downloads/output/RPMS/x86_64/mediacenter28-28.0.110.x86_64.rpm