Support Threads

Hi, i have many pages with Charts. I m using wp_chart. Recently this pages didnt show the graphics. This message appears “The widget wp_charts_widget is not available. Please try locate and install the missing plugin. Post on the support forums if you need help.” Any solution or ideas?. The page is http://contractworkplaces.com/web2/encuesta-de-satisfaccion-al-cliente-2016/ Thanks Federico