A Unity ID allows you to buy and/or subscribe to Unity products and services, shop in the Asset Store and participate in the Unity community.
Separate names with a comma.
Also .... Just un checking "Lock Cursor" in the FPS script is a nicer way of achieving the same thing as the script above. [ATTACH]
I had the same issue. I found the following code in the MouseLook.cs script and commended out the lines that made the cursor invisible. Works fine...