The company released an updated driver for your product that will bring back the functionality of your printer. The thing with Apple OS is a bit different because once they release a major update, the drivers need urgent update as most of the products will cease to work. In this case, you will need to install new drivers. You can use the Network Installer driver, because it will automatically download the required files. On the other hand, make sure there is no paper jam or unplugged cables.