DurableFunctionsMonitor: Backend fails to start

I was facing the same issue reported by @junalmeida. Removing and installing the latest version of Azure Functions Core Tools (version 4.0.4915) fixed the issue.

I also updated tooling and it works like @xsurfer pointed out.

I actually solved this. It was using my azure-functions-core-tools from this folder: /Users/*****/.nvm/versions/node/v16.15.0/lib/node_modules/azure-functions-core-tools/bin/func which was v.4.0.4544 So I changed the extension setting durableFunctionsMonitor.customPathToAzureFunctionsHost to point to /usr/local/bin/func which is 4.0.4915 and it started work all ok.

May I ask you to do the same func start --verbose exercise in VsCode’s Terminal window ? What is the outcome then?

I already updated my nvm default node version so its not what it was before.

Well I have very same issue. When I set explicitly what @scale-tone proposed here:

Can you try to go to c:\Users\junior\.vscode\extensions\durablefunctionsmonitor.durablefunctionsmonitor-6.0.0\backend folder, execute the following there:

set AzureWebJobsStorage=my-storage-conn-string
func start --verbose

and post the output (without any sensitive data) here?

it all works well, finds and loads 17 functions and job host starts ok. BUT when I try to open DFM from VCS I get this

@mpriem does it work for you now when triggered from VCS?

sorry. I see what is wrong here. I’m using the VSCode extension and it tries to run it inside the same workspace as my PowerShell functions project. I now moved it inside a dotnet based container and the backend starts without issues.

Thanks for getting me on the right path @scale-tone

Using Functions host: C:\Program Files\Microsoft\Azure Functions Core Tools\func.exe
Attempting to start the backend from c:\Users\junior\.vscode\extensions\durablefunctionsmonitor.durablefunctionsmonitor-6.0.0\backend on http://localhost:37072/a/p/i...
Azure Functions Core Tools
Core Tools Version:       4.0.4785 Commit hash: N/A  (64-bit)
Function Runtime Version: 4.10.4.19213

Warning: Proxies are not supported in Azure Functions v4. Instead of 'proxies.json', try Azure API Management: https://aka.ms/AAfiueq
[2022-11-28T14:50:16.957Z] Csproj not found in c:\Users\junior\.vscode\extensions\durablefunctionsmonitor.durablefunctionsmonitor-6.0.0\backend directory tree. Skipping user secrets file configuration.
[2022-11-28T14:50:19.102Z] A host error has occurred during startup operation '1e1b4f23-ebee-469c-afb3-7be33b6187a8'.
[2022-11-28T14:50:19.103Z] Microsoft.Azure.WebJobs.Extensions.Http: Could not load file or assembly 'System.Net.Http.Formatting, Version=5.2.8.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'. The system cannot find the file specified.
ERROR: Value cannot be null. (Parameter 'provider')ERROR: