Published scorm showing for student in moodle but not admin

Hi, I've replaced an existing Scorm presentation with a new updated one in a Moodle unit. I followed instructions with my manager to do this.  

When I open the presentation in either safari or chrome, a window appears that says it is loading course content. However, it then reverts to a blank window. At one point a 'sesskey' error appeared.
In Moodle I am assigned as a course creator / manager.  If I log in with a test student account the presentation appears and it is appearing in other accounts when I ask others to test it.