Add the raw chicken, enchilada sauce, tomato paste, chicken broth, diced bell pepper, onion, garlic, and all spices to a slow cooker, then mix gently to combine.
Cover and cook on low for 4-5 hours or high for about 3 hours, until the chicken is fully cooked and easy to shred.
Shred the chicken directly in the slow cooker using two forks until it's fully pulled apart.
Add the half block of cream cheese and stir until completely melted and incorporated into the sauce.
Stir in the shredded cheese and let it melt.