no i’m not sure for the remap :s if ken say it is the other way use the other way 
your primal game data bp is name starting by PrimalGameData_whatyouwanthere ? it seem that the loading issue can come from the bad name of the primal game data or maybe you forceload a map in the world setting?
the PIE is only for testing your basic change, it will work even if you don’t make all the step that need to be done for your mod to work in game (for example i can test a new dino without adding them to the primalgamedata 
) maybe you missed some file that you will need to relink and remap in your mod for him to work but i’m not sure i didn’t release anithing or try anything live, only trying change on dino and testing them in PIE to see the effect 