Load Game didn't work for clients

Hello guys this question is asked couple of times but watching them i can’t do anything as they said it somehow didn’t works for me, PLEASE HELP ME ! (This is only thing i need left right now it means to much to me)

Let me explain my problem : I have save game which is works perfectly save and load weapons and Inventory, but problem happens when load game comes to multiplayer, EX. HOST → Create Game → Load Everything → works perfect ! but Clients when join they use the same save from host. Same weapons inv etc… i tried a lots of different things took me about a 2 weeks and after all i came here for help. I can’t do this, i know i did something wrong but please take me to the right direction.

Let me explain a bit how my program (BP) works.
Event Begin play → Cast to Node → Has Authority (If has authority than load) - (If Remote Than Cast to “Node” “Run on Server”) → Load Files → And after — Same as before authority to set loaded variables ----
… And at the end replication model everything works perfect EXCEPT save file. that means what host wears everyone else got the same. All i need is to load for each client (every client to load his own Save Game). Maybe is very easy to do maybe not all i need is your help guys this means a lot to me please ! if you need any pictures or something just tell me i will share it ! Thank YOU !

I use online subsystem steam (just to inform you, because someone complain about it, maybe this will mean something)

Hi there , I have the same exact problem and I am looking for solution
i help You out if I get knowledge about origin of this issue
try to combine this - YouTube
and this three nodes from here [ Get Player Controller → get Unique Net ID → unique Net Id to string ]

This guy have make it somehow ,but he don’t want to tell how exactly he did this…
UE4 4.18.3| First Game | Multiplayer working! - YouTube

Hi! I’ve ran into the exact same problem, do you remember what solved this for you?
Kind regards