Fatal error: Uncaught TypeError: call_user_func_array(): Argument #1 ($callback) must be a valid callback, class vendor does not have a method "index" in /home/u431037865/domains/3ac-collective.com/public_html/3c/46123067/praktikum_04/aplikasi/inti/my_root.php:50 Stack trace: #0 /home/u431037865/domains/3ac-collective.com/public_html/3c/46123067/praktikum_04/index.php(7): aplikasiku->__construct() #1 {main} thrown in /home/u431037865/domains/3ac-collective.com/public_html/3c/46123067/praktikum_04/aplikasi/inti/my_root.php on line 50