I’ll need some more information. First of all when did you get a Wowza License and for what? Streaming Engine or Streaming Cloud? If you got the license after April 2nd, then you no longer have access to the Wowza player since we are discontinuing it.Perhaps you did not see the message posted at top of the forums. Here is the link to the announcement:
If you did have Engine or Cloud before April 2nd, what are your camera sources? Webcams? Apple or Android phones? Please share more info, but again- if you downloaded Wowza AFTER April 2nd, that is why Wowza Player is not launching for you.