Running Internet App results in blank page

The educational site app https://app.middleburyinteractive.com/dashboard gives a blank page with Norton enabled.  In Google, Settings, Extensions, disable Norton and the app works; no more blank pages.

See attached for 3 screen shots.  On the first page/screen shot is where 'Lessons' is selected to get to the 2nd page/screen shot where the app comes up blank.  The 3rd page/screen shot is where Norton is disabled in Google Extensions.

How do I resolve this without turning off Norton in Google Extensions?