I am a new owner of two kasa KC410S camera. On that note, it isn't part of the models i could select. I am the main user account and I use an android and my parents use iPhones. They have zero issues using the light and plug products. Well I finally turned on and set up one camera and I have no issues while I am using my samsung note 20 ultra, then I tried to show my parents how to work it in my dad's Kasa IPhone app and it was wonky. He can view the image just fine, but when I tried to stop the patrol mode or do anything in the settings it would give an error i think it was "unauthorized user or unauthorized error". So I proceeded on trying it out on my samsung s7 plus tablet and had zero issues. So it's an iPhone issue specifically the spot tilt camera.
*we are all on the same wifi network
*we are all signed in to one account
*I also made sure the kasa app wasn't open in my android while i operate their iPhone kasa app.