I am trying to reference a .csproj to my project, but it is throwing this error...
So, I cloned this repo
https://github.com/Wacom-Developer/sdk-for-ink-wpf
And I am trying to reference it to another project. Namely this one
https://github.com/Wacom-Developer/sdk-for-ink-wpf/blob/master/Samples/WILL3-DemoApp-WPF/WILL3-DemoApp-WPF.csproj
What is the problem? And How can I fix it? I appreciate any kind of help. Thanks in advance!
And I am trying to reference it to another project. Namely this one
What is the problem? And How can I fix it? I appreciate any kind of help. Thanks in advance!

GitHub
WILL™ SDK for ink supports a variety of input technologies and generates the highest quality, most attractive digital ink outputs via these modules: Path generation and smoothing, Rasterizer, Manip...
GitHub
WILL™ SDK for ink supports a variety of input technologies and generates the highest quality, most attractive digital ink outputs via these modules: Path generation and smoothing, Rasterizer, Manip...