There is also a typo in the groove.ini, as there a two headers with 'GROOVE_2' .
from erros.txt :
INIReader: content/tracks/njmp_lightning/data/groove.ini > KEY_NOT_FOUND: [GROOVE_3] MIN
INIReader: content/tracks/njmp_lightning/data/groove.ini > KEY_NOT_FOUND: [GROOVE_3] MAX
INIReader: content/tracks/njmp_lightning/data/groove.ini > KEY_NOT_FOUND: [GROOVE_3] MULT
INIReader: content/tracks/njmp_lightning/data/groove.ini > KEY_NOT_FOUND: [GROOVE_3] NAME