I didn’t know you had replied to my answer. You need to use the syntax @username if you want to ping someone.
The JSON you posted has the binding to the data but doesn’t have the data itself. I think you need to disable the binding (temporarily) and then copy and paste again into a new post. Check that the data is in the JSON before posting.
I can see from what you have posted, however, that you don’t seem to have followed the advice I give in my first post. You need the structure indicated by items (1), (2) and (3). You seem to have created a binding on (1). That’s not correct. You need to create an object (2) and bind to that. Then your series need to point their series.0.data.source to that object as shown in my first post.