Thank you. Much appreciated!
As a quick follow-on, the advice from strenif is to delete the duplicated files which are throwing up the error on startup.
I have deleted the following files from game/images/interface_images/minigame/ so that the game now works on startup:
ASS_Affect_paint_timed_event.rpyc
HTBYD_paint_timed_event.rpyc
Shower_Run_01_timed_event.rpyc
Shower_Run_02_timed_event.rpyc
Shower_Run_03_timed_event.rpyc
I have done this as a Mac user since the .bat executable doesn't work for us. However, deleting those files works for PC users too if they do not wish to use the .bat file for whatever reason.