Ring Door Bell Setup Failure

My Ring has worked for over 6 months. My wifi password needed to be changed. I reset my Ring door bell with the new wifi password and my Ring says my password is incorrect. I have repeated the procedure six times. I have an IPhone and turned off the Cellular data- as I have heard that can cause issues. I have unistalled the APP on my phone. I know that my wifi password is correct, but my Ring fails set-up. I have held down the orange reset button on the back of the unit for thirty seconds to do a factory reset. I still am not able to connect to my wifi with the Ring device. Also, my wifi signal is strong at the areas I'm working. I have no other thoughts on what is wrong? Please help. Suggestions? -W