some thing wrong about the skybox in unity 5

Unity Engine
1

hi guys, i just post this issue to scripting section, but no answers…
here is the link to my issue, thanks in advance~

2

Go to the texture propierties window for the textures of the skybox cubemap (in the asset explorer) and possibly you see a warning color yellow that say that the texture have a problem, below you see a button that say “FIX” and this can fix the problem, apply FIX to the 6 textures, good luck.