Please take a look at this article explaining how you can change those settings in your particular web browser: https://support.guitartricks.com/hc/en-us/articles/360016144754-Sound-is-muted-automatically-when-starting-a-Lesson?mobile_site=true

We would also suggest accessing the site from a different web browser (Chrome, Firefox, Edge) and see if that resolves your issue.

The issue is not coming from the Guitar Tricks program itself, so we are not able to change those settings on your personal web browser. We apologize for any inconvenience.