Sprinkle chicken breasts with salt, pepper, and paprika.
Place chicken in crock-pot.
Mix wine, soup and mushrooms until well combined, mixing in sour cream NOW if you will be cooking on low.
Pour over chicken breasts.
Sprinkle with paprika.
Cover and cook on low 6-8 hours or high 2 1/2-3 1/2 with sour cream added in for last 30 minutes.
Serve sauce over chicken with rice or noodles.
I find this is best cooked on low. My crockpot cooks it in about 6 1/2 hours. The last time I made this I didn’t have any white wine or even white cooking wine in the house so for an acid (even though it’s optional) I added some Lawry’s Herb and Garlic Marinade. About half a bottle and it came out great.