On PS4 so I have no way of fixing this myself, without starting a new game, Brynjolf is not in Riften it shows he is out of bound in the world map, so I can't join the Guild. The blacksmith is gone so I can't turn in firesalt. The traders are all gone. Mjoll the lioness also poof gone. The rest of the cities I visited was fine, didn't see people missing, got things done. I think the npcs still are in the game somewhere, but unlike a PC I have no console commands to port them to me. Really disappointed in this glitch. Too far in to start a new game, is there nothing that can be done at this point? Possible a mod on PS4 to get them back or some kind of patch?