IP 6 Quart Stuck on Preheat, Float Valve not rising and spewing steam/water

Help! This is the second time trying to cook chicken thighs that this has happened. I think there is about 2.5 cups of chicken broth in there. Not sure what the problem is. Thanks!

Help! This is the second time trying to cook chicken thighs that this has happened. I think there is about 2.5 cups of chicken broth in there. Not sure what the problem is. Thanks!