Adding a chart to a page causes my records not to load

Hi - I’m trying to add a chart to one of my pages.  I followed the chart piece of the Superbank launch webinar and the steps in the help document  Visualizations: Charts and Graphs.  I can preview it and it looks great.  But when I try to reload my page to see what everyone will see, nothing loads.  It also affects loading my other pages.  Any thoughts on what i’m missing? Thanks in advance!