What causes Internal Server error 500 in Roblox? Most of the time, Roblox Internal Server error can mean a number of things.

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.

If the ROBLOX game you are trying to join is currently not available and you see error Code 109, Unable to Join, then see this post.