Can't add package

[mkkroliks]

Hi, I can't add xgen using marathofile and add command. When I do marathon add [email protected]:JohnSundell/Xgen.git it's cloning a repository and can't finish. When I add [email protected]:JohnSundell/Xgen.git to marathonfile I'm getting following error:
💥 Failed to update packages
👉 Make sure you have write permissions to the folder '/Users/mk/.marathon/Packages/'
I was adding Files, Unbox, etc. and everything was working except xgen.