This is a well known issue, since the game archive is built on Windows these files don't contain necessary flags.
You need to apply chmod to the launch script too (file with the name of your game in the parent dir).
EDIT: I was expecting to see this mentioned in the manual, but cannot find any note about this either, so apparently this is another thing that has not been documented.
You need to apply chmod to the launch script too (file with the name of your game in the parent dir).
EDIT: I was expecting to see this mentioned in the manual, but cannot find any note about this either, so apparently this is another thing that has not been documented.