Hi Guys,
The development team released last week a note 2273595 which solves an issue where a user received "500 Internal Server Error" on the Web Dynpro portal after clicking on Logoff button on the content player window.
This issue occurs because Web Dynpro session can timeout when learner is playing a Web Based Training for a log time.
To solve the issue please apply support package listed in the note or correction instructions attached to the SAP note.
Regards
TEM an LSO Support