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Can't start the default Azure Function in Visual Studio 2022

Owen Chen 0 Reputation points
2025-07-02T04:32:17.5366667+00:00

Visual Studio 2022 17.14.7

Core Tools Version: 4.0.7317 Commit hash: N/A +5ca56d37938824531b691f094d0a77fd6f51af20 (64-bit)

Function Runtime Version: 4.1038.300.25164

Following the quick start (https://learn.microsoft.com/en-us/azure/azure-functions/functions-create-your-first-function-visual-studio) to create a new Azure Function in Visual Studio 2022.

I got the following error when I hit F5 to start the function:

Grpc.Core.RpcException: 'Status(StatusCode="Internal", Detail="Error starting gRPC call. HttpRequestException: Requesting HTTP version 2.0 with version policy RequestVersionOrHigher while unable to establish HTTP/2 connection.", DebugException="System.Net.Http.HttpRequestException: Requesting HTTP version 2.0 with version policy RequestVersionOrHigher while unable to establish HTTP/2 connection.")'

Developer technologies | Visual Studio | Debugging
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  1. Surya Amrutha Vaishnavi Lanka (INFOSYS LIMITED) 245 Reputation points Microsoft External Staff
    2025-07-30T06:07:43.92+00:00

    Simple Steps

    1. Close Visual Studio
    2. Open Environment Variables

    Search: Edit the system environment variables → click it 

    Click Environment Variables

    1. Add a New System Variable

    Click New under “System variables”

    Name: DOTNET_SYSTEM_NET_HTTP_SOCKETSHTTPHANDLER_HTTP2SUPPORT

    Value: 0

    Click OK

    1. Restart Your PC
    2. Open Visual Studio Again

    Open your Azure Function project

    Press F5 to run

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