【Unity】「DXT1 compressed textures are not supported when publishing to iPhone XXXX」

エラー内容 Unity 2017.4.0f1 で iOS ビルドしようとしたら下記のエラーが発生しました DXT1 compressed textures are not supported when publishing to iPhone Packages/com.unity.ads/Editor/Resources/Editor/landscape.jpg Included from scene: UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr) DXT1 compressed…