[FIXED ON LIVE 1.19.8.0] You are missing packages that are essential to run Microsoft Flight Simulator. Please update the application and try again

Quite early in this thread andy already pointed to the publishedpackages file which lists all required packages, that file might be hidden by default on your PC, therefore I posted the content some time ago but I will repost it here (and add it to the first post so others can find it without the need to scroll thru 300+ posts).

There is a PublishedPackages_Content_Cgl.xml which points to a

fs-base-cgl

And the big one PublishedPackages_Content_Mandatory:

VCockpits →

asobo-vliveries
asobo-vcockpits-core
asobo-vcockpits-systems
asobo-vcockpits-instruments
asobo-vcockpits-instruments-generic
asobo-vcockpits-instruments-navsystems
asobo-vcockpits-instruments-airliners
asobo-vcockpits-instruments-wasm
asobo-vcockpits-instruments-da40
asobo-vcockpits-instruments-a320-neo
asobo-vcockpits-instruments-b747-8
asobo-vcockpits-instruments-b787-10
asobo-vcockpits-instruments-cj4

ARBITRARY AIRCRAFT CHOSEN AS MANDATORY–>
asobo-aircraft-c152
asobo-aircraft-tbm930

GENERIC AIRCRAFT →
asobo-aircraft-generic-airliner-quadengines
asobo-aircraft-generic-airliner-twinengines
asobo-aircraft-generic-piston-multiengines
asobo-aircraft-generic-piston-singleengine
asobo-aircraft-generic-privatejet
asobo-aircraft-generic-turbo-multiengines
asobo-aircraft-generic-turbo-singleengine

MODELLIB →
asobo-modellib-airport-generic
asobo-modellib-buildings
asobo-modellib-props
asobo-modellib-texture

SIMOBJECTS →
asobo-simobjects-animals
asobo-simobjects-boats
asobo-simobjects-characters
asobo-simobjects-landmarks
asobo-simobjects-misc

BONGFISH →
bf-pgg
bf-texture-synth-lib

BIG FILES →
pc-fs-base-bigfiles

CGL MINIMAL →
fs-base-cgl-minimal

INGAMEPANELS →
fs-base-ingamepanels-atc
fs-base-ingamepanels-camera
fs-base-ingamepanels-checklist
fs-base-ingamepanels-common
fs-base-ingamepanels-controls
fs-base-ingamepanels-flyassistant
fs-base-ingamepanels-fuel
fs-base-ingamepanels-navlog
fs-base-ingamepanels-objectives
fs-base-ingamepanels-teleport
fs-base-ingamepanels-vfrmap
fs-base-ingamepanels-weather

OTHER →
asobo-cameras
asobo-discovery
asobo-environment-cameras
asobo-flight-tutorials-default
asobo-freeflights
asobo-jetways
asobo-landingchallenge
asobo-liveevent
asobo-material-lib
asobo-mission-templates
asobo-vfx-material-lib
asobo-scenarii
asobo-services
fs-base
fs-base-achievements
fs-base-ai-traffic
fs-base-aircraft-common
fs-base-aircraft-icao
fs-base-effects
fs-base-effects-legacy
fs-base-marketplace
fs-base-material-lib
fs-base-nav
fs-base-vegetation-material-lib
fs-base-soundbanks
fs-base-ui-pages
fs-base-ui-vr
fs-devmode

Most of the packages (folders) will be in your OneStore folder but some of them are in the (probably) hidden folder, for me they are in

C:\Program Files\WindowsApps\Microsoft.FlightSimulator_1.18.15.0_x64__8wekyb3d8bbwe\Packages

where you should find:

fs-base-onboarding
fs-base-propdefs
fs-base-spb
fs-base-ui
fs-base-videos

Like I said, you might not find this folder because it’s hidden. I will not post how you can make it visible because when you make it visible you can damage and delete important stuff which might end in a not starting Windows system and I don’t want to be responisble for something like this.

Google if you want to know how to make it visible.

If you find missing folders or are unsure if the content of a folder is really the latest udpated versions just ask around, this forum is full of friendly people.