Dashboard is blank

Hi - early July I completed a dashboard, pulling information from a sheet and several reports. It was working fine even as late as last week.

Today, when I went to check the dashboard, when I click into it, it takes me to a blank screen. Can anyone help troubleshoot this? I've attached an image, it's not even like the dashboard widgets have been deleted, there's no dashboard functionality at all when I click through.

Answers