Is this script in the same game universe as the place you are teleporting to? Are you using reserved servers in your game (then TeleportToPlaceInstance won’t work!)? Is your friend that you teleport to not in a vip server?
If it’s not the same game universe, in which did you set ‘allow third party teleports’ to true?
In any case, as seen on the doc page for TeleportToPlaceInstance, you may want to try TeleportAsync
(note: must be called from server)
https://developer.roblox.com/en-us/api-reference/function/TeleportService/TeleportToPlaceInstance
Good luck!