I've compiled this successfully on linux and When I tried to join an online session it said my version was different.
Server uses: 3.0-r170901-1140
You use: 3.0-r170915-2017
I also couldn't help but notice there was no 3.0 stable tag on the bitbucket, Just 2.1.2
Maps, modifications, add-ons, projects, and other releases for Zandronum. Also includes announcers.