Since I updated my Xamarin Forms project to the latest Android Libraries 25.1.1 I can no, longer build a release because of this linker error
>>1>The "LinkAssemblies" task failed unexpectedly.
1>Java.Interop.Tools.Diagnostics.XamarinAndroidException: error XA2006: Could not resolve reference to 'System.Void Android.Support.CustomTabs.CustomTabsIntent::LaunchUrl(Android.App.Activity,Android.Net.Uri)' (defined in assembly 'Plugin.Share, Version=5.0.0.3, Culture=neutral, PublicKeyToken=null') with scope 'Xamarin.Android.Support.CustomTabs, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'. When the scope is different from the defining assembly, it usually means that the type is forwarded. ---> Mono.Cecil.ResolutionException: Failed to resolve System.Void Android.Support.CustomTabs.CustomTabsIntent::LaunchUrl(Android.App.Activity,Android.Net.Uri)
1> at Mono.Linker.Steps.MarkStep.MarkMethod(MethodReference reference)
1> at Mono.Linker.Steps.MarkStep.MarkInstruction(Instruction instruction)
1> at Mono.Linker.Steps.MarkStep.MarkMethodBody(MethodBody body)
1> at Mono.Linker.Steps.MarkStep.ProcessMethod(MethodDefinition method)
1> at Mono.Linker.Steps.MarkStep.ProcessQueue()
1> at Mono.Linker.Steps.MarkStep.Process()
1> at Mono.Linker.Steps.MarkStep.Process(LinkContext context)
1> at MonoDroid.Tuner.MonoDroidMarkStep.Process(LinkContext context)
1> at Mono.Linker.Pipeline.Process(LinkContext context)
1> at MonoDroid.Tuner.Linker.Process(LinkerOptions options, LinkContext& context)
1> at Xamarin.Android.Tasks.LinkAssemblies.Execute(DirectoryAssemblyResolver res)
1> --- End of inner exception stack trace ---
1> at Java.Interop.Tools.Diagnostics.Diagnostic.Error(Int32 code, Exception innerException, String message, Object[] args)
You need to use version 6.X - prerelease as I noted in the Readme as it is built against 25.1.1