Xamarin cross-platform (portable class) project compilation error

Question

I made a new blank cross-platform project using a portable class library in visual studio, BUT when I try to build a platform project I have a list of errors:

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Answer 1

I have created a new Xamarin.forms project (blank shared) with VS2015 Update 3 RC and similar problems (and more, e.g. 'Resource.Attribute' does not contain a definition for 'actionBarSize'.
The problem was the sub-version of JDK (Update 55 instead of Update 79).
You can find my posting to the Resource.Attribute error here: JDK7 problem