GitHub Build an deploy job failure

[Robotuner]

I have a project that has built and deployed in the past, but the build checks are now failing at the 5th step in the Build and Deploy Job.
My project is a dotnet Project, specifically a Uno WASM project. The build steps are:
Set up Job
Build Azure/static-web-apps-deploy@v1
Run actions/checkout@v2
Setup dotnet
Run cd UnoPhotoViewer/UnoPlatformViewer.Wasm <------fails at this step.
remaining steps follow

The messages I am getting are:
Determining projects to restore... /home/runner/work/PhotoViewer/PhotoViewer/UnoPhotoViewer/UnoPhotoViewer.Wasm/UnoPhotoViewer.Wasm.csproj : error NU3028: Package 'System.Security.Cryptography.Csp 4.3.0' from source 'https://api.nuget.org/v3/index.json': The repository primary signature's timestamp found a chain building issue: UntrustedRoot: self signed certificate in certificate chain /home/runner/work/PhotoViewer/PhotoViewer/UnoPhotoViewer/UnoPhotoViewer.Wasm/UnoPhotoViewer.Wasm.csproj : error NU3037: Package 'System.Security.Cryptography.Csp 4.3.0' from source 'https://api.nuget.org/v3/index.json': The repository primary signature validity period has expired. /home/runner/work/PhotoViewer/PhotoViewer/UnoPhotoViewer/UnoPhotoViewer.Wasm/UnoPhotoViewer.Wasm.csproj : error NU3028: Package 'runtime.opensuse.[13](https://github.com/Robotuner/PhotoViewer/actions/runs/4981918885/jobs/9168919333?pr=130#step:5:14).2-x64.runtime.native.System.Security.Cryptography.OpenSsl 4.3.0' from source 'https://api.nuget.org/v3/index.json': The repository primary signature's timestamp found a chain building issue: UntrustedRoot: self signed certificate in certificate chain /home/runner/work/PhotoViewer/PhotoViewer/UnoPhotoViewer/UnoPhotoViewer.Wasm/UnoPhotoViewer.Wasm.csproj : error NU3037: Package 'runtime.opensuse.13.2-x64.runtime.native.System.Security.Cryptography.OpenSsl 4.3.0' from source 'https://api.nuget.org/v3/index.json': The repository primary signature validity period has expired. /home/runner/work/PhotoViewer/PhotoViewer/UnoPhotoViewer/UnoPhotoViewer.Wasm/UnoPhotoViewer.Wasm.csproj : error NU3028: Package 'runtime.ubuntu.[14](https://github.com/Robotuner/PhotoViewer/actions/runs/4981918885/jobs/9168919333?pr=130#step:5:15).04-x64.runtime.native.System.Security.Cryptography.OpenSsl 4.3.0' from source 'https://api.nuget.org/v3/index.json': The repository primary signature's timestamp found a chain building issue: UntrustedRoot: self signed certificate in certificate chain
I get the same message for every package in the project. I cannot figure out how or where to correct the signature issue. The project builds and runs on my machine locally, so it does not appear to be a configuration on my desktop development environment. I have added a GPG key to my settings, but that didn't help.

Researching, it appears to be related to https://devblogs.microsoft.com/nuget/microsoft-author-signing-certificate-update/

It points to a Nuget index.json problem. My issue is that I have not been able to figure out where in GitHub to make correction. I have even added a nuget.config file to my WASM project which does not seem to make any difference. I am now sitting on over a years worth of updates to the project that I cannot merge to the main branch and deploy!

When I ask chat gp how to udate the ssl/tls certificate on github, the response is "If you are encountering SSL/TLS certificate issues specifically related to GitHub repositories under the github.com domain, it is recommended to reach out to GitHub Support for assistance. They can help investigate and resolve any SSL/TLS-related problems you are facing."

Any help would be appreciated. Thanks.

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