Just a heads up for folks on macOS 10.15 who get this error:
For some reason the binary at Contents/MacOS/In The Crags was not flagged as executable. Fix this by cding into the directory in the terminal, then running `chmod +x In\ The\ Crags\ b0228\ mac`. That works. After that, I get this notification, too:
Which is probably Unity messing with your entitlements. (It also tries to connect to Unity's servers at launch.)
Now I can play tonight!