Hi, everyone!
Really sorry for the trouble here! This article is actually on the topic of Articulate's new HTML5 responsive player for mobile (a little different from the Articulate Mobile Player app you may have installed on your Android device or iPad), but no matter. We still want to help you!
The most likely cause of a course not opening properly in Articulate Mobile Player (AMP) is that the course wasn't published with the most recent version of the authoring tool. The authoring tool could be Articulate Storyline or Articulate Studio, but that's irrelevant to you--you just need to be able to access the course!
I'd recommend reaching out to the person who gave you this course and telling them that Articulate says the course needs to be re-published with the latest version of Storyline or Studio. Once they've done that, you should be able to access the course without a problem.
Of course, we'd also love to help you here if you continue to have trouble:
http://articulatecase.com