Why is the object not displayed on the stage?

Question

Unity

Help me understand, the created object is not displayed in Unity, while it is visible on the camera and it is displayed during compilation.

Answer 1

If you need a circle, try using lineRender( https://docs.unity3d.com/ru/530/ScriptReference/Li... )

Answer 2

Check the Z coordinates of the camera and your object. He may be "behind" the camera. Try changing the layer of the object.
Try creating a new object through the hierarchy: 2D gameObject - square. If all else fails, then create a new 2d project and first of all create a 2d object.