Many players, myself included, are getting this error message in my place, which uses TeleportService to move players around between places within the game universe very often (approx. 1 minute spent in each place).
The message states:
Same account launched game from different device. Reconnect if you prefer to use this device. (Error Code: 273).
This error occurs when logged in to Roblox on only one device. I think it is occurring because TeleportService thinks teleporting to the new place instance is resulting in the client being connected to two different games at once, so it kicks you.
This bug occurs about 20% of the time, and always immediately after teleporting between places.