Did you recently change your password? What to do after [or before] you change your Apple ID email address or password - https://support.apple.com/HT204071 - After you change your Apple ID email address or password, you might need to update your sign-in information with any Apple services you're using.
My iPhone keeps asking me to sign into my Apple ID but when I type in my password it just says error.
User profile for user: Ryanharvey93
Question: Phone keeps asking to sign into Apple ID and won’t work