when I import the plugin to my project, it remind me "Assets/GoogleMobileAds/Api/CustomNativeTemplateAd.cs(53,26): error CS0117: `Utils' does not contain a definition for `GetTexture2DFromByteArray'"
But if I import the plugin to another project.It work fine.
This is the related code.

If someone know how to repair it,please help me.Thank you very much.
My unity version is 5.4.1f1.