Deltatime not working anymore?

I was working on my small horror game, and then I went to go do something and then when I came back there was like 1000 errors about deltatime, even though some of the errors where about stuff I did a long time ago and they never had any errors back when I made them and tested them, for example Assets/WcM/Scripts/InFolderScripts/Character Classes/Spins.cs(11,59): error CS0117: Time' does not contain a definition for deltaTime’,
please help me. Thanks in advance.

By the way a example of some of the deltatime code :

public float speed = 10f;

void Update ()
{
	transform.Rotate(Vector3.up, speed * Time.deltaTime);
}

Have you, perchance, named one of your scripts “Time”? If so, rename it to something else - “MyTime”, for example.