I cannot add audio to one of my imported lessons

I’m trying to add an audio file to a lesson but it doesn’t accept my audio and there is no sign of any warning. I just scroll or select the mp3 file but it doesn’t show anything.

Please email us ( support(at)lingq.com ) and send us lesson URL and mp3 file you are trying to upload. We will look into it.

Hi zoran,
Thank you for the reply! I sent an e-mail to the lingQ support about the problem.