interactive: Can't open or create .Net Interactive notebook

On a clean Windows 11 install of VS Code (or Insiders), and installation of .Net Interactive notebooks, I can’t create or open .Net Interactive notebooks. I’m not sure if this is different from #1813.

.Net Interactive 1.0.2462010 is the latest version that opens a UI when I select “Create a new .Net Interactive Notebook”. Newer versions just hang with the message “Activating Extensions…” which seems to time out after a couple seconds:

But even if a notebook (.dib or .ipynb) is created with the earlier versions, I can’t seem to execute any C# code - kernel execution hangs on a Hello World.

Tried installing the .Net 5 SDK, just in case, but that didn’t help. Here’s my full set of .Nets:

PS C:\> dotnet --list-sdks
3.1.416 [C:\Program Files\dotnet\sdk]
5.0.404 [C:\Program Files\dotnet\sdk]
6.0.101 [C:\Program Files\dotnet\sdk]
6.0.200-preview.22055.15 [C:\Program Files\dotnet\sdk]

Repro’d on VS Code:

Version: 1.63.2 (user setup) Commit: 899d46d82c4c95423fb7e10e68eba52050e30ba3 Date: 2021-12-15T09:40:02.816Z Electron: 13.5.2 Chromium: 91.0.4472.164 Node.js: 14.16.0 V8: 9.1.269.39-electron.0 OS: Windows_NT x64 10.0.22000

…and VS Code Insiders:

Version: 1.64.0-insider (user setup) Commit: c6e58d126f6b5676242e32b34180b2a595f29b51 Date: 2022-01-14T05:19:33.429Z Electron: 13.5.2 Chromium: 91.0.4472.164 Node.js: 14.16.0 V8: 9.1.269.39-electron.0 OS: Windows_NT x64 10.0.22000

What can I do to help track down? Should I create a separate ticket? I’ve grown so comfortable using .Net Interactive in my daily workflow, I’m at a loss for what to do!

• OS
  • [ x] Windows 11
  • Windows 10
  • macOS
  • Linux (Please specify distro)
  • iOS
  • Android
• Browser
  • Chrome
  • Edge
  • Firefox
  • Safari
• Frontend
  • Jupyter Notebook
  • Jupyter Lab
  • nteract
  • [ x] Visual Studio Code
  • [x ] Visual Studio Code Insiders
  • Visual Studio
  • Other (please specify)