Here is the error:
2018/03/02 13:29:42 [error] 2370#2370: *1 FastCGI sent in stderr: “PHP message: PHP Fatal error: Uncaught Error: Cannot use object of type WP_Error as array in /www/msheridanmentoring_919/public/wp-content/themes/enfold/config-templatebuilder/avia-template-builder/php/asset-manager.class.php:265