Select Kernel ineffectual

[MadameMinty]

Type: Bug

1. Open latest VSCode Insiders.
2. Open a .ipynb file.
3. Click "Select Kernel" / invoke "Notebook: select notebook kernel" in any way.
4. Pick any kernel from the list. The list will close.
5. No kernel is selected. Cells won't run.

Extension version: 2025.4.0
VS Code version: Code - Insiders 1.101.0-insider (18ed64835ec8f8227dbd8562d2d9fd9fa339abbb, 2025-05-19T02:31:52.657Z)
OS version: Windows_NT x64 10.0.19045
Modes:

System Info

Item	Value
CPUs	AMD Ryzen 5 3600 6-Core Processor (12 x 3600)
GPU Status	2d_canvas: enabled canvas_oop_rasterization: enabled_on direct_rendering_display_compositor: disabled_off_ok gpu_compositing: enabled multiple_raster_threads: enabled_on opengl: enabled_on rasterization: enabled raw_draw: disabled_off_ok skia_graphite: disabled_off video_decode: enabled video_encode: enabled vulkan: disabled_off webgl: enabled webgl2: enabled webgpu: enabled webnn: disabled_off
Load (avg)	undefined
Memory (System)	31.95GB (12.61GB free)
Process Argv	D:\git\__envs\Pathosense.code-workspace --crash-reporter-id 3a5b591f-520b-44f3-9886-67366bc5af70
Screen Reader	no
VM	0%

[MadameMinty]

Additional details:
VSCode (Release): both versions of the extension seem to work.
VSCode Insider: Seems to work when I switch the extension to Pre-Release version. Stops working when I switch back to Release. So it seems like a VSCode Insider + Jupyter Release combo issue. Might actually be core VSCode Insider fault.

[rebornix]

I found that it's broken only when Python Environments ms-python.vscode-python-envs is installed. It threw an exception about missing executable.

[DonJayamanne]

@MadameMinty pleaser can you install three latest version 2025.4.1
This should be fixed