Didn’t work for me too.
I can’t find Microsoft.FlightSimulator_8wekyb3d8bbw folder. Steam Version for me. Is it normal?
Bellow another solution from ZenDesk hope this could help somebody
Not for me. I can’t have access to Content Manager (MSFS 2020 doesn’t start for me due to you are missing packages that are essential to run Microsoft Flight Simulator error message and again no WGS folder present in my drive…
Any help is apreciated…I don’t know what to do 
Hello everyone,
Find a solution on YouTube. Hope it help!
(Valid for Steam version of MSFS 2020). It works for me 
Just to resume, need to remove files on steam directory indicated on video ( important to remove directories installed during last update, see date for that) and then rebot MSFS 2020.
If Market place result unavailable turn off , reboot and then turn on again “Data Connection” (Option/General/data). More info about that at https://flightsimulator.zendesk.com/hc/en-us/articles/360017006900-How-to-fix-a-grayed-out-Marketplace-tile#:~:text=To%20fix%20this%20issue%2C%20simply,sign%20out%2Fsign%20in%20again.
Cheers
Fixed on 1.19.8.0