I used a new archive function to make the server files for 1.66c, which unfortunately doesn't seem to play nice with Linux. Server files that should be more Linux friendly in the link below:
https://drive.google.com/open?id=1jfp4C0Dm2nT1sJt6m6aur9UXqqDoo5NZ

Note: I am unable to push them to CurseForge because the DankNull version we use has been removed from CurseForge.

1.67 fixes this issue.