build error monkey island 2 german amiga version

[gabberhead]

extracting game resources works, but when u build it right after the extraction, i get this error:

DOBJ not yet supported
Rebuilding game resources: GAME
┌─────────────────────────────── Traceback (most recent call last) ────────────────────────────────┐
│ in build:63 │
│ │
│ in rebuild_resources:178 │
│ │
│ in update_loff:164 │
└──────────────────────────────────────────────────────────────────────────────────────────────────┘
AttributeError: 'NoneType' object has no attribute 'to_bytes'
[26060] Failed to execute script 'runner' due to unhandled exception!

extracting txt and import it, this is working.