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With .NET 6.0 RC2(6.0.100-rc.2.21469.5) SDK, I can't install Blazor WebAssembly AOT workload.

See original GitHub issue

Describe the bug

This issue may be caused by the Feed, is the Feed signed?

Workload installation failed: One or more errors occurred. (Failed to validate package signing.

Verifying Microsoft.NET.Runtime.WebAssembly.Sdk.Msi.x64.6.0.0-rc.2.21468.3

Signature type: Author
  Subject Name: CN=Microsoft Corporation, O=Microsoft Corporation, L=Redmond, S=Washington, C=US
  SHA256 hash: AA12DA22A49BCE7D5C1AE64CC1F3D892F150DA76140F210ABD2CBFFCA2C18A27
  Valid from: 9/29/2020 5:00:00 PM to 10/5/2023 5:00:00 AM

error: NU3008: The package integrity check failed. The package has changed since it was signed. Try clearing the local http-cache and run nuget operation again.

Package signature validation failed.

To Reproduce

Install latest Dev17.0 Preview 5(main-31721.352).
Install .NET 6.0 RC2 SDK from: Pipelines - Run 20210919.1-6.0.100-rc.2.21469.5-109627 artifacts (azure.com)
Add feeds: https://pkgs.dev.azure.com/dnceng/public/_packaging/6.0.100-rc.2.21469.5-shipping/nuget/v3/index.json
Open commandline as administrator, run below command to install AOT workload, but failed. dotnet workload install wasm-tools
Run below command to install the workload and skip the advertising manifests, failed again. dotnet workload install wasm-tools --skip-manifest-update