For using this add-on WP Publisher, you have to install a special plugin to export destination WordPress.
This is a plugin which provides some functions for WP Publisher Add-on.
Named "Junoe XML-PRC Additionals", but it has some functions except XMLRPC.
Please search by "Junoe" .
If you cannot install via WordPress management screen, please download plugin zip file from WordPress public repository and extract it , upload to your WordPress plugin directory.
Please activate this plugin in WordPress management screen.
Change Permalinks setting by WordPress management screen menued by "Settings" →"Permalinks" . Select "Post name" option.