I am getting the following error: 3575385a-adce-4cf6-ac4d-7c23ef7905a5 What does this mean and how can i fix this within Workbench?

How can I create hourly comparison charts and graphs in workspace? If I pull two different time periods (for example today and yesterday) and want to view the change in visits by hour, how can I pull this? When i pull the hours dimension it contains the date and time, and does not allow me to compar...