NG not working: nothing showing up

Hi wveryone.
I heve converted my site (www.iclowdellospedale.it) from XOOP to WP 3.7 by Gconvert service.
Everything ok, even Nextgen Gallery.
Then I upgraded to WP 3.8.1… and NG stopped working (version 2.0.40).
I mean, “Gallery not found. Please check your settings.” in the photo albums page.
I f I try to insert an album (they are still there and so gallries) this is what I obtain:
https://drive.google.com/file/d/0B3u6EeWrnLL4dHAwTUV4cktKb0U/edit?usp=sharing

Ok.

https://wordpress.org/plugins/nextgen-gallery/