I had this problem from XenopediaEntriesforUpgradedAircraftWeapons mod, that needs editing in researches.xml:
original: Functional:
SetCurrentTurretLevel(1); UpgradeBuilding("MissileTurret", "LaserTurret");
SetCurrentTurretLevel(2); UpgradeBuilding("LaserTurret", "PlasmaTurret");
SetCurrentTurretLevel(3); UpgradeBuilding("PlasmaTurret", "MAGTurret");