Im prety sure, this was anserd before but i cant find it. maybe not.
I have a larger spacedock in orbit around minmus, with science bays & n stuff also two EL pads, and two engineers (lvl1 currently i guess) i have enought metal, scrap metal, ore and other stuff, a melkter, workshop( both engineers assigend to it) enouth rocket parts etc. however, i cant build anything. the productivity of the workshop is negative, same on the cupola. is there a known bug/ issue with other mods? (I have quite a few of em)
it was also strange that the teardown was working and now tic