I'm experiencing the same bug with Firefox 44.0.2, Windows 7, 1600x900, playing elves - dunno how it was caused, but I have a [EDIT: not Golem2, but Granite Golem] and 2 Treant 2 productions (not) running right now, the rest same as OP. Notable addition: I get displayed with tens of thousands of sword dancers. Current situation: Barracks not useable, no units producable, no production deletable. Expected situation: Barracks useable once again, unblock recruitment.
EDIT2: Since I did not have all slots in my Barracks filled, I tried simply recruiting new units. That unblocked the barracks, though the recruiting order was strange and I still have way too many sword dancers.