The Scorm Player no longer plays my Scorm LOs.  The player opens showing the title of the LO but does not play it.  It worked previously and no longer works. 

I had the problem yesterday and created a new DB. I tested the LO and it worked.  Now it won't work again. The error in IE is as follows: 

Line:  128
Char:  2
Error:  'the .xmlTree' is null or not an object
Code:  0

Is this a common error?

Hello, we never experienced this kind of issue and it's really strange it appears randomly ...
Does it happens with all the lo or with a single object?
Claudio 

It has happened with both the Docebo scormpackage.zip and another test scorm package.  Once the player fails to play a scorm LO it stops playing all scorm LOs--even ones that are recently uploaded.

Problem solved.  In the configuration setup I had changed the elearning URL to /doceboCms since my entry was from the Cms.  I backtracked all my changes and discovered that changing the elearning URL back to /doceboLms solved my problem. I appreciate your looking into this.