MP3 audio track isn't playing audio

So I'm having an interesting issue which I've never run into on Premiere before.  I'm running version 2017.0.2, FWIW. I'm working on a video which has multiple different video files overlayed over an audio track.  The audio track is an mp3 file which I have imported into premiere - I have done this many times. For some reason, however, I am now having major issues getting an mp3 track to play properly.  I have tried opening it in the source window, nothing plays.  I even tried deleting the file from my computer, than downloading it again; the first time I did this, half of the track had sound, and when I tried doing it again, the whole track was mute again.

Does anybody have any idea what is going on? Is there anything I can do or try to get this to work?