When trying to subscribe to my MSGraph message event i get an error

Question

Hi everyone i'm doing this tutorial https://learn.microsoft.com/en-us/graph/tutorials/azure-functions
I'll leave the steps i'm doing after finishing the tutorial.

I created an app function in portal.Azure
]1
2.-Then I replace ngrokUrl value to my app function url
]3
3.- I started debugging, WHEN using ngrok, my subscription shows up correctly but when replacing ngrok value for my app function url.
In this part i get an error saying this.

If someone could help me i'd appreciate it.

Answer 1

And Object which you are trying to access, is null (a non initialized object) - can you please ensure, that graphClient is not null at the breakpoint?

Based on the code from: https://learn.microsoft.com/en-us/graph/tutorials/azure-functions?tutorial-step=4 this get's initialized above from the _clientService.