Cannot upload docx files after updating to 3.0.10

I can upload if I type docx instead of asterisks in the allowed extensions.

/opt/drupal/web/modules/contrib/imce/src/Plugin/ImcePlugin/Upload.php

    if ($exts !== '*') {
      $validators['file_validate_extensions'] = [$exts];
    } 

It worked when changed to the following.

    if ($exts !== '*') {
      $validators['file_validate_extensions'] = [$exts];
    } else {
      $validators['file_validate_extensions'] = [Null];
    }

I made this change because it is handled as follows in the core.

/opt/drupal/web/core/modules/file/src/Upload/FileUploadHandler.php

  protected function handleExtensionValidation(array &$validators): string {
    // Build a list of allowed extensions.
    if (isset($validators['file_validate_extensions'])) {
      if (!isset($validators['file_validate_extensions'][0])) {
        // If 'file_validate_extensions' is set and the list is empty then the
        // caller wants to allow any extension. In this case we have to remove the
        // validator or else it will reject all extensions.
        unset($validators['file_validate_extensions']);
      }
    }
    else {
      // No validator was provided, so add one using the default list.
      // Build a default non-munged safe list for
      // \Drupal\system\EventSubscriber\SecurityFileUploadEventSubscriber::sanitizeName().
      $validators['file_validate_extensions'] = [self::DEFAULT_EXTENSIONS];
    }
    return $validators['file_validate_extensions'][0] ?? '';
  }

Problem solved for me.
Thanks a lot.