Issue #3472120 by liam morland, joseph.olstad: Remove calls to file_validate() which is deprecated

modules/custom/wxt_ext/wxt_ext_media/src/Element/Upload.php

@@ -44,8 +44,8 @@ public function getInfo() {
   public static function validate(array &$element, FormStateInterface $form_state) {
     if ($element['#value']) {
       $file = File::load($element['#value']);
-
-      $errors = file_validate($file, $element['#upload_validators']);
+      $file_validator = \Drupal::service('file.validator');
+      $errors = $file_validator->file_validate($file, $element['#upload_validators']);
       if ($errors) {
         foreach ($errors as $error) {
           $form_state->setError($element, $error);