"Sign in to apple podcasts" keeps popping up on Macbook air

Anytime I try to do ANYTHING on my Macbook air, I keep getting an annoying dialogue popup that wants me to sign in to Apple Podcasts with my Apple ID and password.

I don't even use Apple Podcasts, so I am not sure where this is coming from or why. I have tried simply inputting my Apple ID and password, but it continues to pop up and ask me to sign in, and I have to just keep clicking cancel every two seconds. This is very disruptive as I am in an online masters program and do all of my school work on my laptop.

Does anyone know how to prevent this from constantly popping up?!?!