Steam doesnt sync with paradox launcher

Can you translate that message for us please? Being an image we can't run it through Google Translate. Thanks.

And, have these games and that launcher run okay before this? Do you know what change or update seemed to trigger this propblem?  

That message means you have run. eu4.exe directly, not started the game from Steam. It is normal in that situation. What happens if you start the game from the Steam PLAY button?

HOI4 will not show that message, only EU4 does. What happens if you start the game from the Steam PLAY button?