Как исправить фатальную ошибку Call to a member function fetch_assoc() on resource in?

public static function findRecordFirst($propertyFilter) {
 (161)   $result = empty($mysqliResult = static::find($propertyFilter)) ? [] : $mysqliResult->fetch_assoc();

    // Secondary check - for fetch_assoc() result
    return empty($result) ? [] : $result;
  }