On this page (and a few others) I get the below

On this page (and a few others) I get the below error:https://cncwebsolutions.com/clients-area/clients/cart.php/?a=add&pid=87

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Warning: file_get_contents(https://cncwebsolutions.com/clients/templates/orderforms/modern/js/main.js) [function.file-get-contents]: failed to open stream: HTTP request failed! HTTP/1.1 403 Forbidden in /home/cnckevin/public_html/wp-content/plugins/whmcs-wordpress-integration/whmcs-integration.php on line 1076