Error message when selecting email templates to send emails

[phongkni]

Email template has been selected, but when click send email, will see this error message:

Fatal error: Uncaught exception 'WebServiceException' with message 'Permission to perform the operation is denied' in C:\xampp\htdocs\include\Webservices\Retrieve.php:40 Stack trace: #0 C:\xampp\htdocs\modules\com_vtiger_workflow\VTEntityCache.inc(25): vtws_retrieve('19x8', Object(Users)) #1 C:\xampp\htdocs\modules\com_vtiger_workflow\VTEntityCache.inc(116): VTWorkflowEntity->__construct(Object(Users), '19x8', false) #2 C:\xampp\htdocs\modules\com_vtiger_workflow\VTSimpleTemplate.inc(23): VTEntityCache->forId('19x8') #3 C:\xampp\htdocs\include\utils\CommonUtils.php(2393): VTSimpleTemplate->render(Object(VTEntityCache), '19x8') #4 C:\xampp\htdocs\modules\Emails\mailsend.php(117): getMergedDescription('DEMO COMPANY...', '8', 'Users') #5 C:\xampp\htdocs\modules\Emails\Save.php(185): include('C:\\xampp\\htdocs...') #6 C:\xampp\htdocs\index.php(485): include_once('C:\\xampp\\htdocs...') #7 {main} thrown in C:\xampp\htdocs\include\Webservices\Retrieve.php on line 40

PS: has enabled the cbCompany module with all permissions