[Bug]: Unable to log in to GitHub Copilot using GitHub credentials in VS Code 1.109.5

[DrPritam]

Environment

Coding Platform: VS Code
Coding Platform version: 1.109.5 (user setup)
Commit: 072586267e68ece9a47aa43f8c108e0dcbf44622
Date: 2026-02-19T19:43:32.382Z
Electron: 39.3.0
ElectronBuildId: 13313481
Chromium: 142.0.7444.265
Node.js: 22.21.1
V8: 14.2.231.22-electron.0
Operating System: Windows_NT x64 10.0.26200
Extension name: GitHub Copilot App Modernization
Language of your code: N/A (authentication step)
Selected model: N/A

How to Reproduce

1. Open VS Code.
2. Install and enable GitHub Copilot App Modernization extension.
3. Run the command to sign in to GitHub Copilot.
4. A browser window opens for GitHub authentication.
5. After entering GitHub credentials and completing authentication, VS Code does not successfully activate Copilot.
6. The login process fails / does not complete.

Expected behavior

After authenticating with GitHub credentials in the browser, VS Code should successfully activate GitHub Copilot and enable App Modernization features.

Screenshots & Logs

No log files were generated in the .github/appmod directory during authentication.