can't generate pdf

Hello, i really was interested in the pdf templating system, but unluckly im not able even to create a base pdf, everytime i click the link to generate pdf (for http://www.popeating.it/magazine/sang-hoon-degeimbre-porta-il-foodpairing-a-le-strade-della-mozzarella/?output=pdf) the page reload and nothing happen

https://ww.wp.xz.cn/plugins/wp-mpdf/