i'm able to enter the game now. however, both land and air factory will disappear once it completes its upgrade to level 2 HQ. naval is ok. only tested UEF on 2 maps for now (rebels' rest and metal shark).

Update: did one custom on seton and one co-op on overlord (where no mod was applied), both had the same problem on UEF. i haven't tested other races yet.