Fatal error: Uncaught exception 'Facebook\Exceptions\FacebookAuthenticationException' with message 'Error validating application. Application has been deleted.' in /var/www/custom_built_apps/facebook/src/Facebook/Exceptions/FacebookResponseException.php:106 Stack trace: #0 /var/www/custom_built_apps/facebook/src/Facebook/FacebookResponse.php(210): Facebook\Exceptions\FacebookResponseException::create(Object(Facebook\FacebookResponse)) #1 /var/www/custom_built_apps/facebook/src/Facebook/FacebookResponse.php(255): Facebook\FacebookResponse->makeException() #2 /var/www/custom_built_apps/facebook/src/Facebook/FacebookResponse.php(82): Facebook\FacebookResponse->decodeBody() #3 /var/www/custom_built_apps/facebook/src/Facebook/FacebookClient.php(225): Facebook\FacebookResponse->__construct(Object(Facebook\FacebookRequest), '{"error":{"mess...', 400, Array) #4 /var/www/custom_built_apps/facebook/src/Facebook/Facebook.php(469): Facebook\FacebookClient->sendRequest(Object(Facebook\FacebookRequest)) #5 /var/www/custom_built_apps/fa in /var/www/custom_built_apps/facebook/src/Facebook/Exceptions/FacebookResponseException.php on line 106