The Roblox error 500 can be one of the indicators of an on-going server problem so what you have to do is to check the game’s server status.

What is a 500 internal server error? How to fix the common message you receive when a website won't load ...

Anytime you see the “HTTP 500: “Internal Server Error” message in Roblox, you’re either trying to publish your game or make changes to it on the backend.