Currently, OneNote Education Customers that attempt to create a OneNote Class Notebook will receive the following error: “Sorry, we can't create your notebook now. Please try again later. Reference number: 37cf8891-27b1-482c-875c-63e955d47eef". Teachers will also see a similar message when they clicking on create, add student, add teacher, get notebook link buttons.
Update: This issue is currently resolved.