Well, it's loading the main.inc.php file, but for some reason it isn't loading the bootstrap.php file, which is in the same directory. Maybe make sure you've got all the files?, then try it directly, the logs seem to suggest it's embedded in an iframe or something.
Then check your php.ini include path, it looks like it's been modified:
include_path='.;C:/BitNami/wampstack-5.6.31-0/php/PEAR;C:/BitNami/wampstack-5.6.31-0/frameworks/smarty/libs'
This could be overridden by Apache config or .htaccess
You're seeing a few script timeout errors and oversized post data errors as well. How many web applications are you running on this server?