Redd::Models::Comment.from_id throwing key not found :author

Redd::Models::Comment.from_id method is not able to form a comment from an id. It is saying ket not found author

`comment=Redd::Models::Comment.from_id reddit_session.client, comment.id`

I also tried with comment.name and it gave the same error. Is this the right way to create a comment object or is there something wrong?