Simply opening the help patches shows the issue as the html is not rendered.
Resolved RTFM! at GitHub - vvvv/VL.CEF: Set of nodes to use the Chromium Embedded Framework (CEF) in vl.
Notice that you have to use the right version available in nuget.org also for vl.cef.skia and vl.cef.stride, so that should maybe be updated in the README file in github.