OAuth will time out between refreshes. After about an hour (or less) it will prompt you to sign in again. Error message is in the image below. Once you sign-in and connect everything is fine. And you can refresh again without connecting. But once idle it will give the error again and you have to sign in again.

OAuth will time out between refreshes. After about an hour (or less) it will prompt you to sign in again. Error message is in the image below. Once you sign-in and connect everything is fine. And you can refresh again without connecting. But once idle it will give the error again and you have to sign in again.