HTTP triggered functions crash on Mac with Grpc.Core.RpcException

[carlosbkm]

HTTP triggered functions crash on Mac OS with this exception:

Unhandled exception. 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.")

This is happening for any HTTP triggered functions. Even with the Http Trigger template. Same codebase works on Windows 10 and on Azure.

Steps to reproduce the error:

1. Create a new project with func init MyProjFolder --worker-runtime dotnet-isolated
2. Add an HTTP trigger with func new --template "Http Trigger" --name MyHttpTrigger
3. Navigate to MyProjFolder and start the function with func start

Environment details:

• Azure Function Core Tools version: 4
• .NET versions: 7 and 8 (isolated)
• OS: macOS Sonoma version 1.4.12
• CPU architecture: x64
• worker model: dotnet-isolated