Why can't I insert models ingame with Adonis admin commands?

This is very odd. I try to insert models into my game (e.g. plane) but it won't work. Yes, I own the models, I created them. It seems to be a problem with the code because it will not work on any group games(games created by a group), but it will work on games I created from my account. Please help. (I have tried replacing it with another admin script but the same thing happens). I'm pretty sure this is a ROBLOX updates problem. Although this is not about Lua it may have something to do with the admin script's code or roblox in general.