Audio bug?

I’m not sure whether it’s just me or everyone has been experiencing this, but when I use Memrise on the web I will be prompted by an audio question and the audio won’t come out? This has been going on for a couple days or so now, and I was wondering whether this was a bug or something wrong with the course I’m doing. It happens on every course I do though… I mostly do the HowtoStudyKorean Unit 1, 2 and 3 courses however… Unit 3 originally had no audio, but units 1&2 both had audio that has now disappeared… Help?! Hahaha…

check your sound on your P.c, might be on mute, also check your settings on your account