Mouseclick landing of screen

Im using this code to move my player to where the mouse is clicked. It has been working great. But at some point something happened and now the debug line shows the mouseclick to be Waaaaay of the screen (and my player moves there). I have not done anything to this code. I have stripped the project of everything but one gamobject with this code and still it produces these values:

print (string.Format ("MousePosition {2} - Camera: {0} - Target: {1}", camera.transform.position, target, mouseClick));

MousePosition (2189.0, -75.0, 10.0) - Camera: (0.0, 0.0, -10.0) - Target: (507.1, -56.3, 0.0)

MousePosition (2309.0, 90.0, 10.0) - Camera: (0.0, 0.0, -10.0) - Target: (542.4, -7.8, 0.0)

MousePosition (2831.0, 71.0, 10.0) - Camera: (0.0, 0.0, -10.0) - Target: (695.8, -13.4, 0.0)

 if (Input.GetMouseButtonDown (0)) {
                         var mouseClick = Input.mousePosition;
                         mouseClick.z = 0 - camera.transform.position.z;
 
                         var target = camera.ScreenToWorldPoint (mouseClick);
 
                         Debug.DrawLine (camera.transform.position, target, Color.red, 10f);
                         print (string.Format ("MousePosition {2} - Camera: {0} - Target: {1}", camera.transform.position, target, mouseClick));
                 }