Had the exact same problem, i remove zeiss and am curently reloading back into game, will report back to see if i am able to enter battle.
ok, was able to reenter the game, firs tthing i notices was my camera was no longer stuck from teh center of my ship, (is that normal for teh ziess mods? or is it a bug when in port?) and second thing...so far i was able to enter battle just fine