A number of star base modules (still) have the wrong prerequisites. As a result some give double effects and others are not build-able at all.
The StarbaseModuleDefs.xml file:
PrecursorStudiesCenterModule
<UpgradesFrom>XenoArcheologyInstituteModule</UpgradesFrom> should be <UpgradesFrom>PrecursorEngineeringCenter</UpgradesFrom>
InterstellarCollectorModule
<StarbaseModule>OrbitalReplicatorModule</StarbaseModule> should be <UpgradesFrom>OrbitalReplicatorModule</UpgradesFrom>
OrbitalInstituteModule
<StarbaseModule>OrbitalResearchCenterModule</StarbaseModule> should be <UpgradesFrom>OrbitalResearchCenterModule</UpgradesFrom>
ZeroGArenaModule
<StarbaseModule>ZeroGBalletModule</StarbaseModule> should be <UpgradesFrom>ZeroGBalletModule</UpgradesFrom>
FranchiseCenter
<StarbaseModule>StarbasePromenade</StarbaseModule> should be <UpgradesFrom>StarbasePromenade</UpgradesFrom>
TradeCenterModule
<UpgradesFrom>TradePost</UpgradesFrom> should be <UpgradesFrom>TradePostModule</UpgradesFrom>
TradingHubModule
<UpgradesFrom>TradeCenter</UpgradesFrom> should be <UpgradesFrom>TradeCenterModule</UpgradesFrom>
TradingMechaModule
<UpgradesFrom>TradingHub</UpgradesFrom> should be <UpgradesFrom>TradingHubModule</UpgradesFrom>