Blazor WASM debugging on Chrome & Edge has stopped working

[lucaswalter]

Describe the bug

I am unable to debug a newly-created standalone blazor WASM app with Chrome.

To Reproduce

1. Create new blazor wasm app using: dotnet new blazorwasm
2. Follow additional setup in documentation: https://docs.microsoft.com/en-us/aspnet/core/blazor/debug?view=aspnetcore-5.0&tabs=visual-studio-code#debug-in-the-browser
3. Create default VS Code launch configuration (below)
4. Attempt to run and debug newly created configuration

{
    // Use IntelliSense to learn about possible attributes.
    // Hover to view descriptions of existing attributes.
    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
    "version": "0.2.0",
    "configurations": [
        {
            "name": "Launch and Debug Standalone Blazor WebAssembly App",
            "type": "blazorwasm",
            "request": "launch",
            "cwd": "${workspaceFolder}"
        }
    ]
}

Exceptions (if any)

Message shown after starting debug (about 10-20 seconds after):

Further technical details

• ASP.NET Core version: 5.0.202
• Include the output of dotnet --info
• The IDE: VS Code (Mac) version: 1.55.2

.NET SDK (reflecting any global.json):
 Version:   5.0.202
 Commit:    db7cc87d51

Runtime Environment:
 OS Name:     Mac OS X
 OS Version:  11.0
 OS Platform: Darwin
 RID:         osx.11.0-x64
 Base Path:   /usr/local/share/dotnet/sdk/5.0.202/

Host (useful for support):
  Version: 6.0.0-preview.3.21201.4
  Commit:  236cb21e3c

.NET SDKs installed:
  2.2.207 [/usr/local/share/dotnet/sdk]
  3.1.302 [/usr/local/share/dotnet/sdk]
  3.1.401 [/usr/local/share/dotnet/sdk]
  3.1.402 [/usr/local/share/dotnet/sdk]
  3.1.403 [/usr/local/share/dotnet/sdk]
  3.1.408 [/usr/local/share/dotnet/sdk]
  5.0.202 [/usr/local/share/dotnet/sdk]

.NET runtimes installed:
  Microsoft.AspNetCore.All 2.2.8 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.All]
  Microsoft.AspNetCore.App 2.2.8 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 3.1.6 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 3.1.7 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 3.1.8 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 3.1.9 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 3.1.14 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 5.0.5 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 6.0.0-preview.3.21201.13 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
  Microsoft.NETCore.App 2.1.20 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
  Microsoft.NETCore.App 2.1.21 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
  Microsoft.NETCore.App 2.1.22 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
  Microsoft.NETCore.App 2.1.23 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
  Microsoft.NETCore.App 2.2.8 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
  Microsoft.NETCore.App 3.1.6 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
  Microsoft.NETCore.App 3.1.7 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
  Microsoft.NETCore.App 3.1.8 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
  Microsoft.NETCore.App 3.1.9 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
  Microsoft.NETCore.App 3.1.14 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
  Microsoft.NETCore.App 5.0.5 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
  Microsoft.NETCore.App 6.0.0-preview.3.21201.4 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]

[captainsafia]

Closing as a dupe of #31653. That issue contains two workarounds you can leverage in the meanwhile.