How to fix Roblox "Error Code 275"?
Solution 1:
In Roblox, if an error has occurred in the game, a dialog box will show up with a "Roblox has shut down this game server for maintenance (Error Code: 275)". You just have to reload the page again, or wait until the error is resolved. I think that the upgrading of your game doesn't matter. It's probably a coincidence.