Updating 1.4.2.6355

Today, I'm updating Xamarin.Forms 1.4.2.6355 but when build ios app, I get:

Could not load type Xamarin.Forms.Platform._ButtonRenderer, Xamarin.Forms.Platform, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null while decoding custom attribute

Android app work fine.

Thanks you.