Amf Event Exposure Subscription causes panic

[Aharonez]

Hey,
We're trying to post an AmfCreateEventSubscription, and encountered this erorr:

We can see that within the code it's trying to perform the following:

probably causes due that in line 39 there is a null pointer dereference

[andy89923]

Relative Line:
https://github.com/free5gc/amf/blob/4b12b0d16481952168687d507a69856e9e985f8e/internal/sbi/processor/event_exposure.go#L38-L39C2