I googled and this is the first hit.
https://support.rockstargames.com/hc/en-us/community/posts/206923857-GTA-V-The-Rockstar-update-service-is-unavailable-code-202-
I'd put Rockstar game issues on the Rockstar forums. It's where those issues go.
hi guys i need some help fixing my gta v for pc when i try to run it it just stays on the loading picture and the gta v launcher wont run so i opened the gta v launcher it self and it says the rockstar update service is unavailable (code 202) any idea how i can fix this? do i need to update something?