Do a file text search for the word “error” and iterate through them.
You have a lot of errors, i.e look at this
THelper: Packaging (Windows (64-bit)): UE4Editor-Cmd: [2017.04.11-12.03.16:241][ 0]LogInit:Display: LogBlueprint:Error: [Compiler BP_Orbit] Error Can’t connect pins Gamma and Current Gain Vector : Only exactly matching structures are considered compatible. from Source: /Game/Orbit/Blueprints/BP_Orbit.BP_Orbit
UATHelper: Packaging (Windows (64-bit)): UE4Editor-Cmd: [2017.04.11-12.03.16:241][ 0]LogInit:Display: LogBlueprint:Error: [Compiler BP_Orbit] Error Can’t connect pins Current Gain Vector and Gamma : Only exactly matching structures are considered compatible. from Source: /Game/Orbit/Blueprints/BP_Orbit.BP_Orbit