"Invalid Display type" error

Hi, I am a Plus user. I used the plugin to upload images to my website yesterday and it worked fine, I was trying to do the same thing today, and I just get this error. Not a single thing was changed on the website, I even tried updating the plugin, but it didn’t work.

All I get when I try to post a gallery onto a post is the message: Invalid display type

Like this:
http://puu.sh/qzfsj/f8339e25f9.png

Please help.
-Rob

http://ww.wp.xz.cn/plugins/nextgen-gallery/

https://ww.wp.xz.cn/plugins/nextgen-gallery/