Fatal error: Uncaught Error: Class "Flarum\Foundation\AbstractValidator" not found in /opt/lampp/htdocs/forum/flarum/vendor/fof/recaptcha/src/Validators/RecaptchaValidator.php:16 Stack trace: #0 {main} thrown in /opt/lampp/htdocs/forum/flarum/vendor/fof/recaptcha/src/Validators/RecaptchaValidator.php on line 16