[Regression] [Error] unhandlederror-Sign in to GitHub to use the Cloud Agent.

## Error Message
````
unhandlederror-Sign in to GitHub to use the Cloud Agent.
````

## Stack Trace
    at Wot._authHeaders (../src/extension/chatSessions/vscode-node/taskApiBackend.ts:519:9)
    at async Wot._request (../src/extension/chatSessions/vscode-node/taskApiBackend.ts:529:18)
    at async Wot.listTasks (../src/extension/chatSessions/vscode-node/taskApiBackend.ts:571:19)
    at async Hot.fetchSessionList (../src/extension/chatSessions/vscode-node/taskApiBackend.ts:297:20)
    at async (../src/extension/chatSessions/vscode-node/copilotCloudSessionsProvider.ts:1255:23)
    at async Object.refreshHandler ([./src/vs/workbench/api/common/extHostChatSessions.ts:466:18](https://github.com/microsoft/vscode/blob/0e647435e81fb3f319191863154af70b5e197384/src/vs/workbench/api/common/extHostChatSessions.ts#L466))
    at async qf.$refreshChatSessionItems ([./src/vs/workbench/api/common/extHostChatSessions.ts:1133:2](https://github.com/microsoft/vscode/blob/0e647435e81fb3f319191863154af70b5e197384/src/vs/workbench/api/common/extHostChatSessions.ts#L1133))

Raw Stack Trace (minified)

````
Error: Sign in to GitHub to use the Cloud Agent. at Wot._authHeaders (\extensions\copilot\dist\extension.js:3316:24081) at async Wot._request (\extensions\copilot\dist\extension.js:3316:24237) at async Wot.listTasks (\extensions\copilot\dist\extension.js:3316:25334) at async Hot.fetchSessionList (\extensions\copilot\dist\extension.js:3316:19966) at async \extensions\copilot\dist\extension.js:3319:18865 at async Object.refreshHandler (out/vs/workbench/api/node/extensionHostProcess.js:562:35708) at async qf.$refreshChatSessionItems (out/vs/workbench/api/node/extensionHostProcess.js:562:47756)
````

## Details
| Property | Value |
| --- | --- |
| Bucket ID | [`125df313-d4f9-42ef-ff75-72d45651592f`](https://errors.code.visualstudio.com/bucket/125df313-d4f9-42ef-ff75-72d45651592f?product=VSCode&extension=core&commit=0e647435e81fb3f319191863154af70b5e197384) |
| Version | 1.129.0-insider |
| Commit | [`0e647435`](https://insiders.vscode.dev/github/microsoft/vscode/tree/0e647435e81fb3f319191863154af70b5e197384) |
| Last Seen | Tue Jul 07 2026 23:38:07 GMT+0000 (Coordinated Universal Time) |
| Platforms | Windows, Mac |
| Product | VSCode |

---
*This issue was automatically created from the VS Code Errors Dashboard*