https://github.com/symfony/Console/blob/master/Helper/Table.php#L170 InvalidArgumentException ``` php if (!is_array($row)) { throw new InvalidArgumentException('A row must be an array or a TableSeparator instance.'); } ``` instead of ``` php if (!is_array($row)) { throw new \InvalidArgumentException('A row must be an array or a TableSeparator instance.'); } ```