just let them spill more money, a 50% or 100% increase per era.
This server was started one day ago so I assume it's already on 4.5.0. Bug RN2018-2469 is not fixed as myself and others were affected by this bug. If station bonus was collected by other member this intro mission step is not auto-finished.
Playing via Browser.
Other asso members reported issues in the app, description is unclear but seem related to intro missions too.