Trying to sign into the iphone app with my email

I purchased a new iphone and need to log into the phone app. I downloaded the app and clicked sign in. After I enter my email address the option to press continue doesn't advance the screen to be able to enter my password. I'm able to log into the Ring website on my computer so I know the email address and password are correct but on the  iphone I'm not able move pass entering my email address. My email address has a hyphen @xyz-abc.com (not my actual) but it works on the computer and the phone app accepted my email address on an older iphone.