Php Facebook api Fatal Error

Fatal error: Uncaught Facebook\Exceptions\FacebookSDKException: Cross-site request forgery validation failed. Required param "state" missing from persistent data. in C:\xampp\htdocs\son-facebook\vendor\facebook\graph-sdk\src\Facebook\Helpers\FacebookRedirectLoginHelper.php:244 Stack trace: #0 C:\xampp\htdocs\son-facebook\vendor\facebook\graph-sdk\src\Facebook\Helpers\FacebookRedirectLoginHelper.php(221): Facebook\Helpers\FacebookRedirectLoginHelper->validateCsrf() #1 C:\xampp\htdocs\son-facebook\fbconfig.php(18): Facebook\Helpers\FacebookRedirectLoginHelper->getAccessToken() #2 C:\xampp\htdocs\son-facebook\index.php(1): include('C:\\xampp\\htdocs...') #3 {main} thrown in C:\xampp\htdocs\son-facebook\vendor\facebook\graph-sdk\src\Facebook\Helpers\FacebookRedirectLoginHelper.php on line 244