Issues with Windows Installer on CK3

[Dinnendal]

Ahm.. so what the hell? Day one and I'm already having issues?

I installed Crusader Kings 3 and when I try to run the game it shows me a message from the ''windows installer'' that read as follows:

This installation package could not be opened. Verify that the package exists and that you can access it or contact the application vendor to verify that this is a valid Windows Installer package.

Has anyone had this problem? if so.. how do I fix it? Please help.. I bought this game MONTHS ago, because I love the game and franchise, please, don't make me ask for a refund and never play a Paradox game again.

 

[Ulfhednar22]

The same for me.... it’s really painful

 

[AndrewT]

Please try this:

- exit the Steam app entirely
- uninstall Paradox Launcher v2 from the Windows "Apps and features" utility, if still present.

Delete the following folders if still present:

- C:/users/<UserName>/AppData/Local/Programs/Paradox Interactive/
- C:/users/<UserName>/AppData/Local/Paradox Interactive/
- C:/users/<UserName>/AppData/Roaming/Paradox Interactive/launcher-v2/
To see the AppData folder you'll need to enable View Hidden Items in File Explorer.

- run steam.exe as the Windows Admin user

- run the game from the PLAY button in Steam

IF that doesn't help, in this folder are some .log files:
C:/users/<UserName>/AppData/Local/Paradox Interactive/launcher-v2/
Please attach them here.

Note that you can run ck3.exe directly from Windows Explorer, which bypasses the launcher.