inaccessible world

Hello
My girlfriend and I have a huge problem with a world we spent a lot of time on. I am on PC and my wife is on PS4. The problem is this: the loading time of the world is stuck at the end but does not start on the ps4 but when I join my girlfriend with my PC I can access the world but she does not appear at that time on PS4. 
Is there a way to come back to this world with the PS4 to play together? Redoing another world would be a waste of time.
We are both on the bedrock version in Cross-play mode.