In the bowl of your crockpot, combine the chicken broth and flour, whisking until no lumps remain.Add the bell pepper, onion, celery, garlic, ham, peas, corn, salt, pepper, and cayenne. Cover and cook on high for 3-4 hours.In a small bowl, whisk together the cream cheese and milk until combined. It may be a bit lumpy, if so you can heat it in the microwave for a minute or two and that should get rid of the lumps. Add this to the slow cooker and stir. Replace the lid and turn the heat down to low. Let cook for another 30 minutes. If you need to leave it longer before eating, just turn it down to keep warm at that point until you’re ready to eat.