No price appears in the cart

Hi, I have a problem that I cannot solve. After the WP update to 3.8 the Name Yoyr Price plugin did not work anymore corrcetly. Although the product appears ok (I can write in my own price and add to the cart), when I move to my cart the product is valued 0.00€.

Check it our please: https://www.tethys.org/tethys/products/donations-cat/fuel-research/

I have a Woocommerce version 2.1.5 and Name-your-Own-Price version 1.6

Thanks for a prompt answer

Elena

https://www.ads-software.com/plugins/shatner-name-your-own-price-for-woocommerce/