Strange things are going on in the german technology tree...
It says I don't have the requirements for basic technologies that I think are always unlocked. You even can see that I have build them to a decent lvl in the screenshot:
http://prntscr.com/jvn3srthis problem also applies for espionage:
http://prntscr.com/jvn4e2and mutants:
http://prntscr.com/jvn4ihAnd of course this problem is NOT limited to my race Xerjs. It also is the same for humans and toss.