No sound for parts of theory

New to hooktheory for an online class. It is a great application. All parts worked for me last week, then yesterday i tried to do more homework and i am not getting sound from parts of theory. The only sound i get is when using the youtube option. I tried moving from chrome to Firefox. Hookpad works, as well as youtube and other video services, just not theory. Any help would be appreciated.

Thank you for reporting this problem. We just pushed and update that may have fixed this. Can you check the page(s) where you had this issue yesterday and see if they work now.