I am trying to debug my Blazor WASM hosted project, but I get the following error when I run the project:

I don't understand why.

All breakpoints in the server project hit just fine. One thing I noted when I go to Debug->Windows->Modules, I can see the Server project listed there, but I don't see the Client project in the list. Why would that be?

I have gone through many project settings as well, but I cannot figure out what's wrong.

I am using Visual Studio 2022 latest version and application is on .NET9, Blazor WASM, hosted application with Server, Client and Shared projects.

launchSettings.json in the Server project:

{
  "profiles": {
    "IIS Express": {
      "commandName": "IISExpress",
      "launchBrowser": true,
      "environmentVariables": {
        "ASPNETCORE_ENVIRONMENT": "Development"
      },
      "inspectUri": "{wsProtocol}://{url.hostname}:{url.port}/_framework/debug/ws-proxy?browser={browserInspectUri}"
    },
    "IMS5_1.Server": {
      "commandName": "Project",
      "launchBrowser": true,
      "environmentVariables": {
        "ASPNETCORE_ENVIRONMENT": "Development"
      },
      "inspectUri": "{wsProtocol}://{url.hostname}:{url.port}/_framework/debug/ws-proxy?browser={browserInspectUri}",
      "applicationUrl": "https://localhost:5001;http://localhost:5000",
      "dotnetRunMessages": "true"
    },
    "WSL": {
      "commandName": "WSL2",
      "launchBrowser": true,
      "launchUrl": "https://localhost:5001",
      "environmentVariables": {
        "ASPNETCORE_ENVIRONMENT": "Development",
        "ASPNETCORE_URLS": "https://localhost:5001;http://localhost:5000"
      },
      "distributionName": "Ubuntu",
      "dotnetRunMessages": "true"
    }
  },
  "iisSettings": {
    "windowsAuthentication": false,
    "anonymousAuthentication": false,
    "iisExpress": {
      "applicationUrl": "http://localhost:31647",
      "sslPort": 44346
    }
  }
}

launchSettings.json in the Client project:

{
  "profiles": {
    "IIS Express": {
      "commandName": "IISExpress",
      "launchBrowser": true,
      "environmentVariables": {
        "ASPNETCORE_ENVIRONMENT": "Development"
      },
      "inspectUri": "{wsProtocol}://{url.hostname}:{url.port}/_framework/debug/ws-proxy?browser={browserInspectUri}",
      "nativeDebugging": true
    },
    "WSL": {
      "commandName": "WSL2",
      "distributionName": ""
    }
  },
  "iisSettings": {
    "windowsAuthentication": false,
    "anonymousAuthentication": true,
    "iisExpress": {
      "applicationUrl": "http://localhost:61992/",
      "sslPort": 44382
    }
  }
}

Any ideas? This is just driving me crazy...

I am trying to debug my Blazor WASM hosted project, but I get the following error when I run the project:

I don't understand why.

All breakpoints in the server project hit just fine. One thing I noted when I go to Debug->Windows->Modules, I can see the Server project listed there, but I don't see the Client project in the list. Why would that be?

I have gone through many project settings as well, but I cannot figure out what's wrong.

I am using Visual Studio 2022 latest version and application is on .NET9, Blazor WASM, hosted application with Server, Client and Shared projects.

launchSettings.json in the Server project:

{
  "profiles": {
    "IIS Express": {
      "commandName": "IISExpress",
      "launchBrowser": true,
      "environmentVariables": {
        "ASPNETCORE_ENVIRONMENT": "Development"
      },
      "inspectUri": "{wsProtocol}://{url.hostname}:{url.port}/_framework/debug/ws-proxy?browser={browserInspectUri}"
    },
    "IMS5_1.Server": {
      "commandName": "Project",
      "launchBrowser": true,
      "environmentVariables": {
        "ASPNETCORE_ENVIRONMENT": "Development"
      },
      "inspectUri": "{wsProtocol}://{url.hostname}:{url.port}/_framework/debug/ws-proxy?browser={browserInspectUri}",
      "applicationUrl": "https://localhost:5001;http://localhost:5000",
      "dotnetRunMessages": "true"
    },
    "WSL": {
      "commandName": "WSL2",
      "launchBrowser": true,
      "launchUrl": "https://localhost:5001",
      "environmentVariables": {
        "ASPNETCORE_ENVIRONMENT": "Development",
        "ASPNETCORE_URLS": "https://localhost:5001;http://localhost:5000"
      },
      "distributionName": "Ubuntu",
      "dotnetRunMessages": "true"
    }
  },
  "iisSettings": {
    "windowsAuthentication": false,
    "anonymousAuthentication": false,
    "iisExpress": {
      "applicationUrl": "http://localhost:31647",
      "sslPort": 44346
    }
  }
}

launchSettings.json in the Client project:

{
  "profiles": {
    "IIS Express": {
      "commandName": "IISExpress",
      "launchBrowser": true,
      "environmentVariables": {
        "ASPNETCORE_ENVIRONMENT": "Development"
      },
      "inspectUri": "{wsProtocol}://{url.hostname}:{url.port}/_framework/debug/ws-proxy?browser={browserInspectUri}",
      "nativeDebugging": true
    },
    "WSL": {
      "commandName": "WSL2",
      "distributionName": ""
    }
  },
  "iisSettings": {
    "windowsAuthentication": false,
    "anonymousAuthentication": true,
    "iisExpress": {
      "applicationUrl": "http://localhost:61992/",
      "sslPort": 44382
    }
  }
}

Any ideas? This is just driving me crazy...

• visual-studio-2022

1 Answer 1

Hit and trial, I figured it out. The following 2 things:

1. I had <DebuggerSupport>true</DebuggerSupport> in the client project file. I removed it.

2. The wasm modules debugging still doesn't work on Firefox. But now it works on Edge and Chrome.