Can't open the game "a javascript error occured in the main process"

Can't open the game "a javascript error occured in the main process"

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The game was working fine until this morning I don't recall changing any files. Tried uninstalling and installing the game and launcher. Tried deleting launcher v2 folders. Can someone help me ? I can't find anything useful for this.


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That looks like a pretty old launcher version. 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 eu4.exe directly from Windows Explorer, which bypasses the launcher.