Github copilot chat in VS is not working

[shravaniv4]

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Hi,
I have valid Github copilot chat subscription and was using it in VS. It suddenly stopped working with below logs in output. There is no change in the subscription or the proxy recently.

I have tried logging out of github account, added again in VS , restarted. Nothing worked.

What could be the issue?
Failed to get available models from Copilot
Issue with setting up the connection to 'https://api.githubcopilot.com/models', if you are using a proxy, check if HTTPS_PROXY is set correctly. https://learn.microsoft.com/en-us/dotnet/fundamentals/networking/http/httpclient#http-proxy
Failed to resolve models
Unhandled exception in AskInConversationAsync: System.Net.Http.HttpRequestException
at Microsoft.VisualStudio.Conversations.CopilotClient.CopilotAPIClient.GetModelsAsync(CancellationToken cancellationToken) in D:\a_work\1\s\src\CopilotClient\CopilotAPIClient.cs:line 717
11:47:00:644 at Conversations.Kernel.CopilotModelResolver.ResolveModelsAsync() in D:\a_work\1\s\src\Copilot.Service.Kernel\CopilotModelResolver.cs:line 185

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[Was85]

Same