I'm getting an error trying to view a notebook in Teams as a guest. It is working when I open it from within the SharePoint Site. Notebooks created from within SharePoint also work. We get the issue when you click on + in Teams and create a new Notebook there. Tested different scenarios and concluded that this is not an isolated case. The same type of error when using two different tenants.
Failed to execute getToken request textStatus:parsererror errorThrown:SyntaxError: JSON.parse Error: Invalid character at position:1 Session Id: dbaaf9d0-3550-4a48-a7d0-6883a8951e16 Correlation Id: 3ddd0d31-5fff-46b0-9d05-3c31c2e2f922