How do I stop the pop-up titled two-factor authentication

Question

I keep getting a pop-up that says

Two-factor authentication

Amazon sent you a verification code:

Text a one-time password (OTP) to +1********24 (***@gmail.com)

[Then there's a space that says "auth code"]

I've never received a text or email with any type of code..

How do I make this pop-up stop?