Check Your Internet
When Curbside says 'Offline' like in the adjacent picture, this does not mean that Curbside is offline, but rather your local internet connection is having trouble.
The first thing to do is check your internet connection. One of the easiest ways to do this is by trying other websites, like YouTube and seeing if they load.
Sometimes the internet will drop for a few seconds, during which the Curbside page will show as "Offline". If you notice other websites are working, try refreshing the page or opening a new tab.