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Good Morning, I'm a bit desperate... I try to invite people to a group where I'm the Admin of the Group. With a get me/friends. I get a List of Users. There have an ID. This ID I try to Use for invite People. For trying I use the https://developers.facebook.com/tools/explorer. So If I do a "Post" with groupID/members and the Param Member and the Value an User ID from my friendlist with "IDFromFriendlist" then I get every time this error Message. "message": "(#100) \"4\" does not resolve to a valid user ID",.

Have someone a Idea what I Do wrong?

Ps. The Number is changed to protect the Account of my friend

Thank you for your Help. Kind Regards, Florian

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