slideshow doesn't display if there is only one image

I’ve been using this plugin for my clients for about 6 months and recently there is a problem with the slider.

If there are more than one image, the slider works fine but only for one image, the slider doesn’t work. I think it just disappears.

The website is http://www.evolution5.co.uk/
and the error page is http://www.evolution5.co.uk/meet-your-team/jamie-barrett/

My client said they recently updated the wordpress version.

Anyone has any idea on this issue please?

http://wordpress.org/plugins/meteor-slides/