Can't read results of SigmaRelatedManager[resources]

[Vangari-Rahul64]

Here I am using Node 20.16.0
I have address class and vendor class which are extended from resource class
address is related to vendor so when we are calling vendor class I am getting this issue

When I am calling address class individually its working fine but when calling throw vendor as a related resource it is giving this issue

Uncaught (in promise) AttributeError: Can't read results of SigmaRelatedManager[resources], AddressResource must resolve() first
at AttributeError.BaseError [as constructor] (exceptions.js:7:42)