After implementing GoldenCAN integration code, if you are facing a blank page problem, it might be due to PHP Include() function being disabled on your website.
For using Include($URL) function, it should be enabled. For more information on Include Function on PHP Manual, you can review the following URL:http://us.php.net/include/
In case you can’t enable PHP Include Function, you can still try using the ReadFile($URL).
More information regarding ReadFile can be found here: http://us2.php.net/readfile