Notice: Undefined variable: helper in C:\xampp\htdocs\ITI\uvdesk\vendor\symfony\maker-bundle\src\Resources\skeleton\crud\templates\index.tpl.php on line 1

Fatal error: Uncaught Error: Call to a member function getHeadPrintCode() on null in C:\xampp\htdocs\ITI\uvdesk\vendor\symfony\maker-bundle\src\Resources\skeleton\crud\templates\index.tpl.php:1 Stack trace: #0 {main} thrown in C:\xampp\htdocs\ITI\uvdesk\vendor\symfony\maker-bundle\src\Resources\skeleton\crud\templates\index.tpl.php on line 1