[Plugin: NextGEN Gallery] Images won't save

I’m having some problems uploading images to nextgengallery.

When I got to the add images screen, I can select the images and the gallery they should go to, but when I click “upload” button nothing happens.

If I disable flash uploads then clicking the updload button makes something happen, but it just works for a few seconds and then reloads the page, the image isn’t actually added to the selected gallery or uploaded anywhere from what I can tell.

https://www.ads-software.com/extend/plugins/nextgen-gallery/