I miss FSX, and the ones before, very easy to edit, install and remove add-ons, they tried to make almost impossible to do this, to then go all the add-ons through their store. Even to create a simple flight in this sim, it’s a headache, confuse, hard to edit. Just the graphics save this sim, not even the flight dynamics are good.
The solution didn’t work for me. The mission just disappeared from the menu, so I went back to original file.
I guess my best score will be B.
The problem was fixed with the last update. Please check the content manager to see if the Landing Challenge Rossvoll, ENRA, is displayed as version 1.2.0 in the content manager. If an older version is displayed there, it has not been updated for you. Then delete the old version, restart the simulator and reload the mission. Then it should work.