Get items permissions in OneDrive for Business usi

Question

Context

I'm trying to get the permissions granted on items in personal OneDrive for Business drives using the Graph RESTful API.

Querying the OneDrive for Business:

GET: graph.microsoft.com/v1.0/drives/<driveID>/items/<itemID>/permissions. 

and :

GET :graph.microsoft.com/v1.0/drives/<driveID>/root/permissions/<itemID>

I'm getting the following error :

"code": "-2130575138, Microsoft.SharePoint.SPException",
"message": "MountPoint security error: host web isn't a personal site"

However, if I send the following request :

GET: graph.microsoft.com/v1.0/drive/items/root/permissions

I get the permissions on my Sharepoint online site. So it works for sharepoint online but not for OneDrive.

Question

How can I retrieve full permissions info using the Graph REST API?

Thanks.