SAP BTP CAP Not authenticated send event 'READ' to 'ProcessorService'

[taao19710316]

Im developing sample application by reffering https://developers.sap.com/tutorials/add-authorization.html 

for SAP BTP however when accessing the file following image point.

the error occures 

Not authenticated send event 'READ' to 'ProcessorService'

Yestureday I once succeed the connection.

Why this is so instable. Is this sample code is already deprecated?

I'm looking forward to your response.