Twitter card not showing Author


Hi, I’ve searched the forums but haven’t found an answer, sorry if this has been covered before.

I’m using All in One SEO Pack plug in and have been told by the designer that I’ve correctly configured the settings and the correct Twitter meta tags are being output, but for some reason Twitter is not picking up the meta data you’ve set.

Here is the link to the webpage I’m trying to share

Thank you in advance,