no audio on Alphabet Pronunciation Practice, module 1

Hi
Some of my audio won't play, some of it does and some don't. e.g. Alphabet Pronunciation Practice. in module 1. I am a platinum member. I'm using windows 10 PC, google chrome and the browser is up to date. Any advice please.
 

Hi Lizzie, 

I am sorry to hear about the problems you were having with the audio and for the delay in getting back to you; did you continue to have problems? Or was the issue resolved? If you continue to have problems, please send them to [email protected]

Kind Regards!