UI buttons and text are being shown as black area

Hello, I am working on a game in Unity3D 5.0.2 and I faced a problem when I switch between scenes. My UI elements are turned into a black area. I have attached the screenshot. Thank you!

I’ve faced with the same problem. My Unity version is 5.4.

I just re-import all assets by selecting menu Assets -> Reimport All and the problem disappeared.

Little late but I fixed this problem by making sure the source image on UI elements actually had an image and wasn’t “none”

I had this problem too.
I found that I need to prompt unity to ‘Refresh’ the meta file of the .texture file that was black area.

So only refreshing the meta file:

  1. Open UnityEditor,
  2. Click on the texture file that appears as black area
  3. In the inspector, click on ‘wrap mode’, and set it again to the value that is set. for instance, if wrap
    mode is ‘Repeat’, click on wrap mode combo box and set ‘Repeat’.
  4. click ‘apply’ in the inspector.
  5. List item

In the end of this steps, the .meta file was changed, event though I didn’t change any value in the Inspector.
I think it implies that Unity treated the old .meta as corrupted for some reason. I n my case I suspect that the old .meta file was generated in an older version of Unity and once I loaded it to in a new version of Unity, then Unity treated it as corrupted.