CefSharp Wpf Missing Method

Question

I'm working on this plugin for Rhino (a 3D modelling software) that opens a web page, therefore I'm trying to use CefSharp in a WPF window.

As a simple proof of concept right now I'm just trying to open a browser that will show Google. Super simple, but not working as I keep getting this error:
System.MissingMethodException: 'Method not found: 'Void CefSharp.IFrameHandler.OnFrameAttached(CefSharp.IWebBrowser, CefSharp.IBrowser, CefSharp.IFrame)'.'

My window:

<Window x:Class="UI.PrototypeBrowser"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    xmlns:wpf="clr-namespace:CefSharp.Wpf;assembly=CefSharp.Wpf"
    mc:Ignorable="d"
    Title="PrototypeBrowser" Height="450" Width="800">
  <Grid>
    <wpf:ChromiumWebBrowser x:Name="Browser" Address="www.google.com"/>
  </Grid>
</Window>

And the code behind:

public partial class PrototypeBrowser : Window
{
    public PrototypeBrowser()
    {
        InitializeComponent();

        Cef.Initialize(new CefSettings());
    }
}

The Rhino command that calls the WPF window (not sure if it's useful):

    protected override Result RunCommand(RhinoDoc doc, RunMode mode)
    {
        PrototypeBrowser browser = new PrototypeBrowser();
        browser.ShowDialog();

        return Result.Success;
    }

And this is thelist of packages I'm using in my solution:

What am I doing wrong?

Thanks for the help!