Can't go on Batuu mission to Canto

I struggle to get the two sims that are recruited for the Canto mission on the Millennium Falcon. After a lot of tries they finally get in the ship but then, my sim doesn't get on the ship at all, they just stay outside waiting. I had a moment where my sim did get on the ship and then they got off by themselves. I've taken mods off and repaired my game but it doesn't fix it.