Ubuntu version 20.10. The console log is:
Adventure Game Studio v3.5 Interpreter
Copyright (c) 1999-2011 Chris Jones and 2011-2021 others
ACI version 3.5.0.30
Initializing allegro
Initializing game data
Game data file could not be found. Search path used: '/home/deejay/Letöltések/IOAWN/data/'
ERROR: Unable to determine game data.
Engine was not able to find any compatible game data.
Searched in: /home/deejay/Letöltések/IOAWN/data/Root cause is the Unicode characters in "Letöltések". When moved to a pure ansi path everything is all right.