Stellaris fails to launch in Steam

[tonychurly]

Error message under windows installer banner
The installation package could not be opened ................
I can launch the game direct from the executable but neither of the msi launcers work and deliver the same error as steam direct.
Anone kow how to fix this?

 

[prismaticmarcus]

Moved to Tech Support

 

[AndrewT]

Please try this:

- 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.

- exit the Steam app entirely
- 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.
To see the AppData folder you'll need to enable View Hidden Items in File Explorer.

 

[tonychurly]

Here you go!

 

[AndrewT]

Unusual errors 1619 and 1620, but still. definitely an issue in the Windows installation service msexec.exe

ERROR_INSTALL_PACKAGE_OPEN_FAILED	1619	This installation package couldn't be opened. Verify that the package exists and is accessible, or contact the application vendor to verify that this is a valid Windows Installer package.
ERROR_INSTALL_PACKAGE_INVALID	1620	This installation package couldn't be opened. Contact the application vendor to verify that this is a valid Windows Installer package.

Try deleting the .msi file in the Steam-Stellaris folder, then do a Steam Verify to make it come down again.

If that doesn't help, try this one instead:

https://launcher.paradoxinteractive.com/v2/paradox-launcher-installer-windows

If you still get the errors, it's a Windows problem I'm afraid! Make a new Windows user on this machine and log into it with that - any better?

 

[tonychurly]

V2Launcher msi fixed this .... Thanks a lot