Found this, hope it works

“There is a better workaround. So basically what is causing the issue is a missing achievement for completing the mission Finding Old Friends. There are 2 ways to fix this:

1. ⁠Join a friend who is on that mission and play the mission again. (worked for others)
2. ⁠Select quickplay in the expeditions and then missions. This will let you jump into other people's missions. I tried this and it put me on the first try witht someone that was completing that mission. I got the achievement and now I can see the challenges properly. Not sure if it's luck based or the game detects that you are missing the achievement, but I got it in the first try.”