Render form validation errors with arguments (#764)

Render form validation errors with arguments

Classes/XClass/Controller/FormFrontendController.php

@@ -241,7 +241,7 @@ private function prepareErrors(array $errors, string $formIdentifier): ?array
  $parsedErrors = [];
 
  foreach ($errors as $key => $errorObj) {
- $parsedErrors[str_replace($formIdentifier . '.', '', $key)] = $errorObj[0]->getMessage();
+ $parsedErrors[str_replace($formIdentifier . '.', '', $key)] = $errorObj[0]->render();
  }
 
  return count($parsedErrors) ? $parsedErrors : null;