Begin by prepping the ingredients. Dice the onion and mince the garlic.
In the crockpot, add the chicken breasts, black beans, corn, diced tomatoes, green chilies, onion, and garlic.
Sprinkle the chili powder, cumin, paprika, salt, and pepper over the ingredients in the crockpot.
Pour the chicken broth over the top, ensuring that all ingredients are well submerged.
Cover the crockpot and set it to cook on low for 6 hours or high for 3 hours.
Once the cooking time is complete, remove the chicken breasts from the crockpot and shred them using two forks. Return the shredded chicken to the soup and stir to combine.
Serve the soup hot in bowls, topped with tortilla strips, avocado, shredded cheese, fresh cilantro, and lime wedges as desired.