Cannot add xAi Language model

[cncDAni2]

• Copilot Chat Extension Version: 59,031,512
• VS Code Version: 1.108.2
• OS Version: Win11, build 26200.7623
• Feature (e.g. agent/edit/ask mode): Not relevant
• Selected model (e.g. GPT 4.1, Claude 3.7 Sonnet): Not relevant
• Logs: -

Steps to Reproduce:

1. Select "Manage models..."
2. Press the "+ Add models" button, select xAi
3. A popup will appear to add an API key. Write an invalid one
4. Try adding a new xAi.
5. ERROR: No popup will appear anymore

[cncDAni2]

Workaround: I removed every VS:Code option: %APPDATA%\Code\ and %USERPROFILE%\.vscode\, but copied extensions back, so it fixed it. (Still, it's an issue...)