Re: you'll need a new app to open this com.epicgames.launcher link

Hypotenuse, I've received the same message, 

After switching to a new computer, I installed the Origin app and installed the Star Wars: Battlefront II game. Came up with the error message.

What didn't work: reinstalling both Origin and game while using Run As Administrator, same message. 

What worked: After installing Origin and Star Wars the second time, I installed the Epic Games launcher (search for "Epic Games launcher" for the epicgames.com link).

After running the Epic Games launcher and logging in, it showed Star Wars: Battlefront II in the library. 

Problems launching the game: I've tried launching the game from Origin, and i get no response at all. I launch the game directly, and it requires I login again in to Epic Games, which opens a browser window to do so. Then it launches Origin and then the game. 

Smoothest way to launch the game: Run the Epic Games launcher (which remembered my login). When I open the library and click the game Launch link there, it will launch Origin, which will then launch Battlefront II. 

Amazing how user unfriendly this is.