VS Code failing to create or load polyglot notebooks following .NET SDK reinstall

Question

My company's brilliant IT department has an unfortunate habit of uninstalling .NET SDK versions that they perceive to be out of date. Recently they uninstalled .NET SDK 6. I have successfully got them to reinstall it, but since then I observe the following behaviour from VS Code:

• When I open an existing, known-good .dib file the notebook doesn't open and I see the horizontal "progress bar" at the top of the window throbbing forever.
• When I create a new notebook nothing visibly happens at all.

Any idea what log files I can look at the try and fault find this? Or what I can change or install?

Here's my dotnet --info

dotnet --info
.NET SDK:
 Version:   7.0.306
 Commit:    f500069cb7

Runtime Environment:
 OS Name:     Windows
 OS Version:  10.0.19045
 OS Platform: Windows
 RID:         win10-x64
 Base Path:   C:\Program Files\dotnet\sdk\7.0.306\

Host:
  Version:      7.0.11
  Architecture: x64
  Commit:       ecb34f85ec

.NET SDKs installed:
  6.0.414 [C:\Program Files\dotnet\sdk]
  7.0.306 [C:\Program Files\dotnet\sdk]

.NET runtimes installed:
  Microsoft.AspNetCore.App 6.0.22 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]        
  Microsoft.NETCore.App 6.0.22 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 7.0.10 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 7.0.11 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.WindowsDesktop.App 6.0.22 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
  Microsoft.WindowsDesktop.App 7.0.11 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]

Other architectures found:
  x86   [C:\Program Files (x86)\dotnet]
    registered at [HKLM\SOFTWARE\dotnet\Setup\InstalledVersions\x86\InstallLocation]

Environment variables:
  Not set

global.json file:
  Not found

Learn more:
  https://aka.ms/dotnet/info

Download .NET:
  https://aka.ms/dotnet/download

Things I have tried:

• rebooting
• uninstalling and reinstalling the Polyglot Notebooks extension
• installing the pre-release version of the Polyglot Notebooks extension

Edit:

For what it's worth, here are the extension logs for when I try to create new blank notebook.

2023-09-15 10:51:30.781 [info] ExtensionService#_doActivateExtension ms-toolsai.jupyter, startup: false, activationEvent: 'onCommand:polyglot-notebook.newNotebook', root cause: ms-dotnettools.dotnet-interactive-vscode
2023-09-15 10:51:31.005 [info] ExtensionService#_doActivateExtension ms-python.python, startup: false, activationEvent: 'api', root cause: ms-toolsai.jupyter
2023-09-15 10:51:31.033 [info] ExtensionService#_doActivateExtension ms-toolsai.jupyter-renderers, startup: false, activationEvent: 'api', root cause: ms-toolsai.jupyter
2023-09-15 10:51:31.034 [info] ExtensionService#_doActivateExtension ms-dotnettools.dotnet-interactive-vscode, startup: false, activationEvent: 'onCommand:polyglot-notebook.newNotebook'
2023-09-15 10:51:31.211 [info] ExtensionService#_doActivateExtension ms-python.vscode-pylance, startup: false, activationEvent: 'api', root cause: ms-python.python

Edit 2: Also raised as an issue here: https://github.com/dotnet/interactive/issues/3178

Answer 1

IT installed the latest .NET 7 SDK (so now I have 3) and that fixed it:

.NET SDKs installed: 6.0.414 [C:\Program Files\dotnet\sdk] 7.0.306 [C:\Program Files\dotnet\sdk] 7.0.401 [C:\Program Files\dotnet\sdk]