over 1 year ago - AndrewT - Direct link
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.  
over 1 year ago - AndrewT - Direct link
Agujhan said: "cannot access file C:\Users\whatever\OneDrive\Documents\Paradox Interactive\Stellaris\launcher-v2.sqlite
Is your Windows user Documents folder actually on OneDrive? If so is that facility on, running and syncing okay?

And do you actually want your documents held on MS's servers?  
over 1 year ago - AndrewT - Direct link
If the Windows user Documents folder has moved onto OneDrive, and the Windows variable points there, then that's where our launcher needs to get access to.

Right click on Documents in the left column of File Explorer, just under This PC there. Go to properties, location. What does it say in there?