Place a large nonstick skillet coated with cooking spray over medium-high heat until hot. Add chicken sausage, and sauté 4 minutes. Remove sausage from pan, and keep warm. Add oil to pan, and heat over medium-high heat until hot. Add sweet potato, paprika, salt, pepper, and hash brown potatoes; cover mixture and cook for 4 minutes. Uncover, and stir well, breaking up any frozen chunks of potato. Stir in sausage; cover and cook 4 minutes. Stir in sage.