<span style="color: #212121; font-family: arial, sans-serif; white-space: pre-wrap;">Unable to create course, please contact administrator!</span>
As per the email conversation you had translated the create course text to unable to create course contact administrator.
Please translate your text again to create course and then it will work fine.
Thank you all good!
I have another question so i<span style="background-color: transparent; font-family: inherit; white-space: pre-wrap; color: #212121;">s it possible to secure the content of the course so that it is not downloaded?</span>
Well for that you can use following methods :
1. Hotlinking :
http://www.wpsolver.com/hot-link-protection-plugins-for-wordpress/
2. using third party content copy protection plugins .
3. Wplms s3 :
http://www.vibethemes.com/downloads/wplms-s3/