I'm trying to give my users the minimum access rights to a folder and documents so that they can add a new version of a document. 

currently, I have the subfolder set to View{all rights}, Add{Create Documents, and Append Data}, Modify{Modify Contents}.

For the documents, I have this.

LF is letting me import the document to the folder, and select the add as new version option, but once I hit import, I get an access denied message. What am I missing?