Fatal error: Uncaught Error: Call to a member function IPP() on null in /var/www/pageperpage/plugins/QuickBooks/quickbooks-php/QuickBooks/IPP.php:1455 Stack trace: #0 /var/www/pageperpage/plugins/QuickBooks/quickbooks-php/QuickBooks/IPP.php(334): QuickBooks_IPP->_request() #1 /var/www/pageperpage/plugins/QuickBooks/quickbooks-php/dev/dev_ids_discounts.php(20): QuickBooks_IPP->authenticate() #2 {main} thrown in /var/www/pageperpage/plugins/QuickBooks/quickbooks-php/QuickBooks/IPP.php on line 1455