Hello John
Thank you for writing to us.
There are many scenarios for Internal Server Error. But specific to Documentor, please check if you are adding a shortcode in page or post which is already added in the documentation of Documentor then Internal server error may occur. Sometimes this error can happen if you are exhausting your PHP memory limit.
Please visit below link which might help you.
http://www.wpbeginner.com/wp-tutorials/how-to-fix-the-internal-server-error-in-wordpress/
Let me know if it helps.
Thank you.
Best Regards,
Sagar
Documentor Support.
