here’s the smoking gun – the folder on your norns is named kria_midi, but the script explicitly is searching for a folder named Kria:
line 14: local kria = require 'Kria/lib/kria'
did you download this from maiden’s package manager? or did you upload it manually?
edit: oh, i guess this is still problematic for folks after they change the folder name? @junklight, any progress?