lesson dialog and vocabulary not present

This is strange. When I go to a lesson, none of the dialogs and vocabulary are visible and none of the play buttons are visible. When I take a "Hear It" quiz, it does not play the audio for me to recognize.

Well, now it is working. That was strange.

Hi Robert, 

I'm glad to hear it's working again, please let us know if the glitch continues. 

Kind Regards!