Error while running event ab_logisticscenter::on_research_finished (ID 18) ab_logisticscenter/logistics_center/technology.lua:48: attempt to perform arithmetic on local 'increment' (a nil value)
stack traceback: ab_logisticscenter/logistics_center/technology.lua:48: in function 'research_lc_capacity'
.../logistics_center/event_handler/on_research_finished.lua:10: in function <.../logistics_center/event_handler/on_research_finished.lua:6>
