how are you getting your access token? It seems like when you're utilizing a flow that's most likely client credentials as it sounds like you're not getting the delegated permissions, but the application permissions. For more information on permissions I suggest taking a look here : https://blogs.msdn.microsoft.com/aaddevsup/2018/05/21/finding-the-correct-permissions-for-a-microsoft-or-azure-active-directory-graph-call/
In addition to that, per your response the AAD Graph API is being deprecated and not supported anymore. If you'd like to get the next page feature working, please utilize the microsoft Graph API.
If you'd like there to be further support for the AAD Graph API please submit your feedback here : https://feedback.azure.com/forums/169401-azure-active-directory and if there's enough community support the product team will look into putting this on the roadmap for the future.
You could also file a support ticket to see if you can get this enabled/supported for your specific scenario.
- Frank Hu