Hi Bhupinder,
I've looked into a previous forum thread that is similar to your
case. The succeeding replies were done in private but the solution suggests explicitly adding/importing the Report classes into your code, and I quote :
"..if you explicitly include ReportClasses.php, will it resolve the issue?
For example, putting below line in your code:
App::import( 'Vendor', ADWORDS_UTIL_PATH . '/ReportUtils.php');"
There was no more response from the user after this reply by support. Let me know if this works.