Why isn’t my audio player working?

I have an audio player installed in some of my posts. When I try to make new posts and add more audio my screen keeps going blank (white) when I click “Upload to Post”.

I gave up on that post and created a test post. I was able to install the audio player but once on the site, the player says “Undefined” and no music plays. This happens when I’m installing MP3’s that are already on the site and I know for sure that they work…still says undefined.

My plug-in is Wiqet though I don’t think that’s the problem.

Help!