tweets only show 'missing user'

Hi,

I filled in all the necessary data, but no tweets are shown.
It just sais ‘missing user’.

On http://www.paardenfotoworkshop.nl/

This is what I entered in the settings:
http://www.paardenfotoworkshop.nl/wp-content/uploads/2014/02/Schermafbeelding-2014-02-20-om-20.52.41.png

This is the shortocde on the homepage:
http://www.paardenfotoworkshop.nl/wp-content/uploads/2014/02/Schermafbeelding-2014-02-20-om-20.52.58.png

What am I doing wrong?

https://wordpress.org/plugins/inline-tweets/