An error is thrown when a rule contains an IP range

It looks like the error is thrown because a boolean is returned in the condition that handles the IP ranges:

// Check as 2 IP address range format.
      $patterns = explode('-', $pattern);
      if (isset($patterns[1])) {
        return ($ip_long >= ip2long($patterns[0]) && $ip_long <= ip2long($patterns[1]));
      }

The `isAllowed()` method in `Filter.php` expects an `AccessResult` object in:

$result = $rule->check($request);
      if ($result->isAllowed()) {
        $is_allowed = TRUE;
      }

Attached is a patch that updates the return statement to return `AccessResult::allowed()` is the check passes and `AccessResult::forbidden()` if it fails.