I´m on version 1.34.16.0
I also have the same issue. I just freshly installed MSFS2020 a couple of days ago. While the download speed was more than slow, it took me several days to download everything on my 1Gbit/s. cable line. Now that i´ve downloaded every content through the content manager the game told me, that there is another essentials update which is recommended to be installed so I clicked install. Then MSFS2020 stepped back into the update screen and then the error occured like everyone else here also has posted..
Now I cannot even start the sim anymore. As soon as the update screen appears, the error pops up and I can only quit. The only way the circumvent the update screen is to create one missing folder called “fs-base-videos” which I have to create in this directory:
*C:\Users<user>\AppData\Local\Packages\Microsoft.FlightSimulator_8wekyb3d8bbwe\LocalCache\Packages\Official\OneStore*
Then I restarted the sim and it skipped the update screen and loaded directly into the game menu but still saying, essential update is available. It´s a loop… While I can play MSFS2020 I still think that with missing the package that some incompatibility may arise. I´m clueless.
I also tried to repair the game through XBox App. No cure!
SUPPLEMENTAL:
I was able to fix my problem by deleting the local cache files of MSFS2020. I deleted every file and folder inside the OneStore folder as written above.
Yes it will force to download the game again but once it was ready and downloaded about 125GB the game loaded into the menu. Then I quit to desktop and was praying that hopefully MSFS would start. So I restart the game and yes, everything seems to be okay now. Now I have to download all sceneries left in the content manager.
I hope that my issue and solution does help someone else as well.


