Generally to check needed permissions for admin menu item: open “Admin menu” for the ‘Administrator’ role and look at the “Capability” column for the menu item.
Some plugins may use conditional check before create admin menu – if user has administrator role. I need access to the source code of plugin in order to look what permissions it requires. If you need further help share plugin’s .zip via Google Drive or DropBox (support [at-sign] role-editor.com ).
