If you right-click the game panel in Origin then choose the repair option that's available, does that help?
If the issue persists, is there any error message, or how does it fail?
March 2015 - last edited March 2015
Make sure that you are running Origin in administration mode
Ensure that.... your Firewall and/or Antivirus are not blocking the connection|Sims 4. The easiest way would be adding an exception for the Origin Client.
If that doesn't work, you may need to manually uninstall Origin, reboot your computer and then download a new client from the Origin website.
And I would recommend checking Task Manager to make sure that Sims 4 process is not running look for