Prepare chicken breasts and cut into bite-sized pieces. Chop onions, red potatoes and cilantro. Set aside.
Add butter to Instant Pot, melt on 'Saute' mode. Add cinnamon and cumin, stir until fragrant, about 2 minutes. Add onions, garlic and ginger. Saute until slight golden brown, about 5 minutes. Be careful not burn mixture.
Add tomato paste and 3 tablespoons water. Stir together. If it sticks, add another tablespoon of water. Press 'Cancel' to turn off Instant Pot to prevent spices from burning.
Add coriander, turmeric, black pepper, cayenne and Kosher salt. Turn 'Saute' mode back on and stir until fragrant, about 2 minutes.
Add chicken pieces, 1 cup chicken broth and 2 1/2 tablespoons flour. Stir together.
Change settings to 'Manual' or 'Pressure Cook' mode and steam release is on 'Sealing' position. Cook chicken for 9 minutes. After chicken is done, do a 'Quick Release'.