doesn't work for me

Hi,

I tried the way you have implemented but it doesn't seem to work for me. I am getting the error 

[6/03/2018 7:49:53 AM] Executing 'Functions.trigger' (Reason='New blob detected: samples-workitems/sample_doc - Copy.pdf', Id=d2e8ff5c-35c4-4634-bf88-40c6d7cdd553)
(node:15496) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 6): UnknownErrorException



