500 Internal Server Error when trying to access the Microsoft Graph API for Viva Engage

I am experiencing an issue when trying to access the Microsoft Graph API for Viva Engage:

https://learn.microsoft.com/en-us/graph/api/resources/community?view=graph-rest-1.0 

Every time I make an API request, I receive a 500 Internal Server Error response.

Here are the steps I have taken so far:

1. Created an App Registration in Azure AD.
2. Assigned the Community.ReadWrite.All permission as per the documentation.
3. Ensured that the token we are using includes the correct and valid permissions.

Despite completing these steps, the error persists. Below is a screenshot of the error encountered when testing the API using Postman:

Are there any steps I might have missed, or is the API currently experiencing issues?