Hit Play [F5] inside Roblox Studio and copy the script PlayerModule inside Players > your name > PlayerScripts.
Once you’re done with that, hit Stop [Shift + F5] and paste it inside StarterPlayer > StarterPlayerScripts.
Finally, go inside StarterPlayer > StarterPlayerScripts > PlayerModule > CameraModule > MouseLockController and change this line
local DEFAULT_MOUSE_LOCK_CURSOR = "rbxasset://textures/MouseLockedCursor.png"
to
local DEFAULT_MOUSE_LOCK_CURSOR = ""