Unable to build main branch, error MC3072

[tractorbeam0]

Describe the bug
Specifically, ...\CPMM\Views\Container.xaml(47,25): error MC3072: The property 'Type' does not exist in XML namespace 'clr-namespace:WPFUI.Controls;assembly=WPFUI'. Line 47 Position 25.

To Reproduce
N/A

Expected behavior
It builds properly

Screenshots

Desktop (please complete the following information):

• OS: Windows 11
• .NET: N/A
• Version: N/A

Additional context
I normally develop with GNU-based tools and the whole Microsoft toolchain is very new to me. I may just have something configured incorrectly, or it may be related to not using VS17 like was suggested, however I don't think it'd be impossible to convert the project to VS22.

[tractorbeam0]

As I look further into it, it's beginning to look like WPFUI is out of date? It's missing many things.
Edit: Oh yes it is, WPFUI has had a complete overhaul since then. This project needs a LOT of updating from the looks of it.