I'm creating a relation from the Article(node) to an Author Profile(node) with a directional relation (is authored by) and (is author of) reverse. I created the relation, the node(author profile) and field to link them together with the relation edit widget on the Article content type. Now, I can't see the edit widget form at all when I edit the content. I also receive this error message.

Warning: array_shift() [function.array-shift]: The argument should be an array in relation_edit_field_widget_form() (line 96 of /ites/all/modules/relation_edit/relation_edit.module).

I'm using the latest dev version of Relation and Relation edit widget.