Unity 2017.2 build iOS project, appear error for landscape.jpg

I use Unity 2017.2 build iOS project, but it appears the error message as below:
DXT1 compressed textures are not supported when publishing to iPhone
Packages/com.unity.ads@1.0.7/Editor/Resources/Editor/landscape.jpg

I close the project and rebuild. The error stills appear. Does someone meet the same error?

 

https://forum.unity.com/forums/ios-and-tvos.27/

 

I install Unity 2017.3 and chmod +x for the package directory /Users/myname/Library/Unity/cache/packages/packages.unity.com/com.unity.analytics@2.0.13/
The problem is solved.

 

I have resolved it with Unity 2017.2.1f1 but with chmod +w

Another stuff that I have done is remplace these two huge images into two little 1 pixel images (to reduce resources)

Thanks for the advise.

PD: I can't use Unity 2017.3.0 because https://forum.unity.com/threads/unity-2017-3-ios-crash-in-recttransofrm.510424/ I <3 Unity anyway.