there's no button as such. Simply close down Origin completely (Task Bar - Exit) and then start it again.
I don't work or have any association with EA. I give advice to the best of my knowledge and cannot be held responsible for any damage done to your computer/game.
Please only contact me via PM when asked to do so.
Disable Origin in-game and see if that helps.
Using CC/Mods is at your own risk, EA are not responsible for making the game compatible with 3rd party content, the creator is.