Got this one when using with "Additional Turret" mod
Failed to load mods: RampantArsenal/prototypes/Cannons.lua:1291: attempt to index field 'action' (a nil value)
stack traceback: RampantArsenal/prototypes/Cannons.lua:1291: in function 'enableCannons' RampantArsenal/prototypes/Turrets.lua:77: in function 'addTurrets' RampantArsenal/data.lua:14: in main chunk