Most Instant Pot models require a minimum of 1 cup of liquid in the recipe to prevent a burn notice. If you've reduced this recipe to less than 1 cup of water and 1 cup of dry quinoa, you may get a burn notice. A burn notice may happen if any food is stuck to the bottom of the insert. If you are toasting the quinoa, use a wooden spoon and the water/broth to scrape any stuck-on quinoa from the bottom of the insert before cooking. Liquid tomato products are notorious for causing a burn notice if it makes contact with the bottom of the insert. If you want to use any tomato sauce, stewed tomatoes, or vegetable juice, add it on top of the dry quinoa before cooking, and don't stir everything together until after it has finished cooking.