Hi Archie,
I think this may be the issue.
In my computer I have a Blend for Visual Studio 2017 & Visual Studio 2017. Normally I use Visual Studio 2017 to open AdvancedHMI projects. Last time I opened the project through Blend for Visual Studio (the screenshots I attached are all from using Blend for Visual Studio). That might have messed up the components. I looked at MainForm.Designer.vb. The components for which errors displayed were missing from Private Sub InitializeComponent().
I deleted that AdvancedHMI project. I have a back up copy of that project. I opened that project from Visual Studio 2017. That is working fine so far.