Tanks tutorial camera control target problem

Hello guys, I started creating this Tank game but there is a problem when I am adding camera control. It doesn’t show target which is required to add tank as a target for the camera. I tried code from finished folder too. Its not helping.
How can I fix it.

In line 8 of the Camera Control Script, delete: [HideInInspector] then save in both Visual Studio( or other script editor) and in Unity and it should appear.