Fatal error: Uncaught Error: Undefined constant "WEB_SERVER_HOST" in /var/www/html/ohnishi-test.site/braintree_php_example-main/braintree_php_example-main/tests/bootstrap.php:4 Stack trace: #0 {main} thrown in /var/www/html/ohnishi-test.site/braintree_php_example-main/braintree_php_example-main/tests/bootstrap.php on line 4