Audio not playing

Hi,
My audio isn’t working at all on any videos on the learning with locals feature or any of the audios on any other exercise. Rarely, one audio file might work on a 3 option listening and the audio works with an unofficial course but none of the official Memrise courses. My audio works fine on other websites and I’ve taken a look at old threads for solutions and have deleted all chrome extensions, tried a different browser, checked my volume mixer and nothing seems to be working.