In the other hands, the 502 error is an issue between 2 different Vietnam server devices on the Internet that aren't communicating properly.
N'ikwu ya n'ụzọ ọzọ, njehie 502 bụ esemokwu n'etiti sava dị iche iche na ịntanetị na-adịghị ekwurịta okwu nke ọma.