Retrieve a User's Friends with their relations(REST)

General
1

Greetings,Am trying to retrieve a users friends with one of their related columns(profilePic) as below but getting an error

https://api.backendless.com/application-id/REST-api-key/data/Users?where=Users%5Bfriends%5D.objectId%3D%27XXXX-XXXX-XXXX-XXX%27%26Users%5Bfriends%5D.profilePic.objectId%3D%27XXXX-XXXX-XXXX-XXXX%27&offset=0&pageSize=20

The error

{"code":1017,"message":"Invalid where clause","errorData":{}}

Regards,