Fixed Files interface crashes issue

src/Form/SyncFilesForm.php

@@ -8,6 +8,7 @@ use Drupal\Core\File\FileSystemInterface;
 use Drupal\Core\Entity\EntityTypeManager;
 use Drupal\Core\File\FileSystem;
 use Drupal\Core\Link;
+use Drupal\Core\File\FileExists;
 use Drupal\sync_files\SyncFilesBatch;
 use Symfony\Component\DependencyInjection\ContainerInterface;
 
@@ -112,12 +113,13 @@ class SyncFilesForm extends FormBase {
     $query = $this->entityTypeManager->getStorage('file')->getQuery();
     $files = $query
       ->condition('status', 1)
+      ->accessCheck(FALSE) 
       ->execute();
     $sync_files = [];
     foreach ($files as $value) {
       $file = $this->entityTypeManager->getStorage('file')->load($value);
       $file_uri = $file->uri->value;
-      $file_exists_error = $this->fileSystem->getDestinationFilename($file_uri, FileSystemInterface::EXISTS_ERROR);
+      $file_exists_error = \Drupal::service('file_system')->saveData($data, $uri, FileExists::Error);
       if ($file_exists_error == FALSE) {
         continue;
       }