Syndicate (2012) Not launching

Whenever I try to launch my digital copy of the game, Syndicate, it tells me the product can't be activated on my computer using the Origin account provided.

If I try to enter my product activation code, it tells me my computer is offline, when it's not, and that the code can't be entered.

I think this has to do with Origin being replaced with EA launcher, since I used to be able to play it on my computer, before the launcher was changed.

Please fix this so that your game I bought is still playable.