Unable to start host for debugging Azure Functions

Issue Type: Bug

When I select F5 to start debugging my Azure Functions, the GUI shows “host start” task spinning for several seconds, then the Terminal displays this message:

Azure Functions Core Tools Core Tools Version: 3.0.3477 Commit hash: 5fbb9a76fc00e4168f2cc90d6ff0afe5373afc6d (64-bit) Function Runtime Version: 3.0.15584.0

Value cannot be null. (Parameter ‘provider’)

Terminal will be reused by tasks, press any key to close it.

It also shows a pop-up window with this text: Exception of type ‘OmniSharp.Extensions.JsonRpc.RpcErrorException’ was thrown.

I have the latest version of PowerShell and the Azure Functions extensions.

Extension version: 1.6.2 VS Code version: Code 1.67.2 (c3511e6c69bb39013c4a4b7b9566ec1ca73fc4d5, 2022-05-17T18:15:52.058Z) OS version: Windows_NT x64 10.0.19044 Restricted Mode: No

System Info

Item	Value
CPUs	Intel® Xeon® E-2276M CPU @ 2.80GHz (12 x 2808)
GPU Status	2d_canvas: enabled canvas_oop_rasterization: disabled_off direct_rendering_display_compositor: disabled_off_ok gpu_compositing: enabled multiple_raster_threads: enabled_on oop_rasterization: enabled opengl: enabled_on rasterization: enabled raw_draw: disabled_off_ok skia_renderer: enabled_on video_decode: enabled video_encode: unavailable_off vulkan: disabled_off webgl: enabled webgl2: enabled
Load (avg)	undefined
Memory (System)	31.76GB (18.94GB free)
Process Argv	–crash-reporter-id f981abc5-56ff-448f-922b-3c168723e687
Screen Reader	no
VM	0%

A/B Experiments

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pythonvspyl392:30443607
pythontb:30283811
pythonvspyt551:30345470
pythonptprofiler:30281270
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vstes263:30335439
pythondataviewer:30285071
vscod805cf:30301675
pythonvspyt200:30340761
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bridge0708:30335490
bridge0723:30353136
vsaa593:30376534
vsc1dst:30438360
pythonvs932:30410667
wslgetstarted:30449410
pythonvsnew555:30457759
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cppdebug:30492333
vsclangdf:30486550

[mdixon-equinix]

Hello: I worked directly with Microsoft Support and we were able to get the issue fixed by taking these steps:

1. Removed the extensionBundle section from host.json file
2. Ran this command in the PowerShell terminal: func extensions install –force
3. This analyzed my functions and reported that extension C# for Visual Studio Code (powered by OmniSharp) needed to be installed.

Once the C# for Visual Studio Code extension was installed, was able to successfully debug my PowerShell Azure Functions.

[cemmetje87]

I was able to resolve this to update extensionBundle in host.josn to: { “version”: “2.0”, “extensionBundle”: { “id”: “Microsoft.Azure.Functions.ExtensionBundle”, “version”: “[3.3.0, 4.0.0)” } }

After restarting VSCode it worked again