I recently deployed the Special Event Operations solution on AGOL. I'm having trouble configuring the Special Event Manager web app. I see that I am supposed to select a group that contains maps that I want to manage through the Manager app. I want events logged through the Special Event survey 123 form to be accessible through this app so they can be approved/denied. When I select my "Special Event Manager" group, content won't populate and it loads forever:

I checked to make sure that the Manager group does have content in it. It contains all content associated with the solution, but for some reason, the group won't connect to this manager app. Oddly enough, my "Emergency Management Editors" group does work with this application, though that is for a different solution and does not include the content I want to access through this app.
Any ideas why the Manager group won't connect to the manager app?