Downloading the current Linux release, seems the folder structure is wrong

[liam@liam-manjaro ~]$ '/home/liam/GOG Games/Sundered®: Eldritch Edition/start.sh'
Running Sundered
chmod: cannot access 'Sundered.x86': No such file or directory
chmod: cannot access 'Sundered.x86_64': No such file or directory
Set current directory to /media/games/Sundered®: Eldritch Edition/game
Found path: /media/games/Sundered®: Eldritch Edition/game/Sundered.x86_64
Mono path[0] = '/media/games/Sundered®: Eldritch Edition/game/Sundered_Data/Managed'
Mono path[1] = '/media/games/Sundered®: Eldritch Edition/game/Sundered_Data/Mono'
Mono config path = '/media/games/Sundered®: Eldritch Edition/game/Sundered_Data/Mono/etc'
The assembly mscorlib.dll was not found or could not be loaded.
It should have been installed in the `/media/games/Sundered®: Eldritch Edition/game/Sundered_Data/Managed/mono/2.0/mscorlib.dll' directory.

Problem is "Sundered_Data/Managed/mono/2.0" is not a folder system the game installs, the file is actually in just "Sundered_Data/Managed" - so I assume a Unity update change folder paths and the Linux release didn't get the memo?