[10.0.100-preview.7.25380.108] UmbracoCMS failed to load resource: the server responded with a status of 401()

[Junjun-zhao]

Is there an existing issue for this?

• I have searched the existing issues

Describe the bug

When running against 3rd part application with dotnet-sdk-10.0.100-preview.7.25380.108, UmbracoCMS app failed load page with below error:
chrome-error://chromewebdata/:1 Failed to load resource: the server responded with a status of 401()

Application Name: UmbracoCMS
OS： Windows 11 24H2
CPU: X64
.NET Build Number: dotnet-sdk-10.0.100-preview.7.25380.108
App & App Source checking at: https://devdiv.visualstudio.com/DevDiv/_workitems/edit/2541067
Github Link: https://github.com/umbraco/Umbraco-CMS

Verify Scenarios:
1). Windows 10 21H2 AMD64 + dotnet-sdk-9.0.303: Pass
2). Windows 10 21H2 AMD64 + dotnet-sdk-10.0.100-preview.7.25374.104: Pass
3). Windows 10 21H2 AMD64 + dotnet-sdk-10.0.100-preview.7.25380.108: Fail

Expected Behavior

The login page can load successful

Steps To Reproduce

App Repro steps：
The machine has dotnet-sdk-10.0.100-preview.7.25380.108 installed.
1.Copy [\...\2541067\Umbraco-CMS] to your local machine.
2. Update Umbraco.Web.UI.runtimeconfig.json with dotnet-sdk-10.0.100-preview.7.25380.108 runtime version:

"frameworks": [
      {
        "name": "Microsoft.NETCore.App",
        "version": "10.0.0-preview.7.25380.108"
      },
      {
        "name": "Microsoft.AspNetCore.App",
        "version": "10.0.0-preview.7.25380.108"
      }
    ],

3. Launch Umbraco.Web.UI.exe.
4. Click "Open Umbraco" button.
   

App Debug Steps: (Please refer the video "UmbracoCMSDebugRepro.gif" from attachment of devdiv bug )
The machine has dotnet-sdk-10.0.100-preview.7.25372.102 installed.
1.Copy "\...\2541067\AppSourceCode\Umbraco-CMS-contrib.zip" and extract to local machine or clone from https://github.com/umbraco/Umbraco-CMS.
2. Update <TreatWarningsAsErrors> to false in \Umbraco-CMS-contrib\Umbraco-CMS-contrib\Directory.Build.props file.
3. Update the global.json file to use the .NET version which installed on your machine.
4. Navigate to "\Umbraco-CMS-contrib\Umbraco-CMS-contrib" folder and execute below command:

​git init
git add .
git commit -m "initial"

5. Open umbraco.sln with Visual Studio.
6. Build "\Umbraco-CMS-contrib\Umbraco-CMS-contrib\src\Umbraco.Web.UI\Umbraco.Web.UI.csproj" project.
7. Update "\Umbraco-CMS-contrib\Umbraco-CMS-contrib\src\Umbraco.Web.UI\bin\Debug\net9.0\Umbraco.Web.UI.runtimeconfig.json" file
   with dotnet-sdk-10.0.100-preview.7.25380.108 runtime version:

"frameworks": [
      {
        "name": "Microsoft.NETCore.App",
        "version": "10.0.0-preview.7.25380.108"
      },
      {
        "name": "Microsoft.AspNetCore.App",
        "version": "10.0.0-preview.7.25380.108"
      }
    ],

8.Switch to launch application with Umbraco.Web.UI from Visual Studio.
9. Press F5 to run Umbraco.Web.UI project.
If it is the first time launch the application, please execute the steps from 10~13
10. Fill Name, Email and Password.
11. Click Next button
12. Click Next button.
13. Click Install button.
If it is not the first time launch the application, please execute the step 14 directly.
14. Click "Open Umbraco" button.

Exceptions (if any)

The login page load failed and show "failed to load resource error" in browser DevTool.

.NET Version

10.0.100-preview.7.25380.108

Anything else?

dotnet info:

.NET SDK:
.NET SDK:
 Version:           10.0.100-preview.7.25380.108
 Commit:            30000d883e
 Workload version:  10.0.100-manifests.8bb6be96
 MSBuild version:   17.15.0-preview-25380-108+30000d883

Runtime Environment:
 OS Name:     Windows
 OS Version:  10.0.26100
 OS Platform: Windows
 RID:         win-x64
 Base Path:   C:\Program Files\dotnet\sdk\10.0.100-preview.7.25380.108\

Host:
  Version:      10.0.0-preview.7.25380.108
  Architecture: x64
  Commit:       30000d883e

.NET SDKs installed:
 10.0.100-preview.7.25380.108 [C:\Program Files\dotnet\sdk]

.NET runtimes installed:
  Microsoft.AspNetCore.App 10.0.0-preview.7.25380.108 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
   Microsoft.NETCore.App 10.0.0-preview.7.25380.108 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.WindowsDesktop.App 10.0.0-preview.7.25380.108 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]

@dotnet-actwx-bot @dotnet/compat

[Junjun-zhao]

@javiercn Could you please take a look at this issue and confirm if this is a blocker for .NET 10 Preview7?
It reproduces on dotnet-sdk-10.0.100-preview.7.25380.108 and not repro on the previous build dotnet-sdk-10.0.100-preview.7.25374.104. Thank you.