Luckily for you I am able to reproduce it in my virtual machine, there appears to be some issue with loading GMX on Linux.
It is specifically occurring while loading Global Game Settings. More specifically when loading the ICO file because GMX does not use Unix compatible file paths. And I can not make LGM write them that way because Studio's IDE can't handle UNIX file paths. So I will need to make it convert the file paths to UNIX when reading binary files.