I am unable to find where this is happening. Can you just delete the old version 4.3 of the theme and install the latest version 4.6 of the theme downloaded from ThemeForest? Looks like we have a PHP error of some kind which is causing this.
If deleting the old version and reinstall of new version does not resolve, pls enable WP_DEBUG in wp-config.php file by setting the flag to true so that we can see the exact error. You can also request your hosting provider to provide you with the error log. By looking at the error, we should be able to nail the issue.