Put the sauerkraut and broth in a pot. Cover and stew for about 15 minutes at low heat, stirring from time to time. Rinse chicken filet, dab dry, season with salt and pepper.
Heat the oil in a frying pan, fry the chicken filet on both sides for about 5 minutes each. Add bacon 2 minutes before the end of the frying time and fry until crispy. Wash chives, dab dry and cut into small rolls.
Halve the ciabatta bread once lengthwise. Cut the chicken filet into slices. Break the bacon into pieces if necessary. Spread some sauerkraut, chicken fillet and bacon on the bottom half of the bread. Sprinkle with chives.
Put the lid on it. Add the sour cream and sprinkle with paprika. Add the rest of the sauerkraut.