You only need to run RA3.exe as admin, hook the game to cnc online, close cnc online then run the game directly from ea app.
i have the ultimate collection from Ea app and tried all of these solutions but when i start the game from the ea app or the .exe file it self
the ea app pops up a message saying (an error on our end caused the launch to fail. Try again a little later)
BTW the game when i open the game normally from the exe RA3.exe it opens up a luncher to choose between RA3 or RA3 Up rising