Valentbr - I've just added a new Mac version of Neofeud that should work with your version of macOS. The new Neofeud Mac download should work with macOS 10.8 - 10.15. I believe you have Mojave (10.14).
The old Mac download is still there as it works with macOS 10.6 - 10.13, in case there some Mac users with older versions of the OS.
Special thanks to General Public for helping create the new Wineskin package!