iOS project compilation fails: Can't resolve the reference 'System.Void Windows.UI.Xaml.Documents.BlockCollection::Add(Windows.UI.Xaml.Documents.Block)

[baptiste-nv]

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Regression

Current behavior

Can't compile a project that reference Uno.UI and Community Toolkit.
Fails with following error message:

error MT2101: Can't resolve the reference 'System.Void Windows.UI.Xaml.Documents.BlockCollection::Add(Windows.UI.Xaml.Documents.Block)', referenced from the method 'System.Void Microsoft.Toolkit.Uwp.UI.Controls.Markdown.Render.MarkdownRenderer::RenderParagraph(Microsoft.Toolkit.Parsers.Markdown.Blocks.ParagraphBlock,Microsoft.Toolkit.Parsers.Markdown.Render.IRenderContext)' in 'Uno.UI, Version=255.255.255.255, Culture=neutral, PublicKeyToken=null'.

Expected behavior

Compile without error

Minimal reproduction of the problem with instructions

Environment

Nuget Package: 

Package Version(s): 
Uno.UI 1.42.0-dev.392
Uno.Microsoft.Toolkit.Uwp.UI.Controls 3.1.0-build.68.g1c44fa8ae7

Affected platform(s):
- [X] iOS
- [ ] Android
- [ ] WebAssembly
- [ ] Windows
- [ ] Build tasks

Visual Studio
- [X] 2017 (version: )
- [X] 2017 Preview (version: )
- [ ] for Mac (version: )

Relevant plugins
- [ ] Resharper (version: )