Chickynoid, server authoritative character replacement

hey I’m having an issue with chickynoid,
I have an empty baseplate on which I have copied all the scripts and parts necessary for chickynoid to run. But when I playtest on that game for some reason roblox still spawns their own character, so I end up with the chickynoid charater, which is the one that I control, plus the roblox R15 character which stays idle on the spawn point and I cant really understand why, so if anyone can help me it would be great.

screenshot of the issue:

and also it seems that the ui gets doubled for some reason.

thank you in advance, and sorry for the essay