I'm receiving the following error message when starting an new chat in GitHub...

I'm receiving the following error message when starting an new chat in GitHub Copilot App:

You are not authorized to use this Copilot feature, it requires an enterprise or organization policy to be enabled.

Request IDs:
- FC3A:264A84:93841D:C0347C:6A8A6180

But it is ok to start a chat on webpage.

Please help. Thank you

---
| Field | Value |
| --- | --- |
| App version | 1.1.12 |
| OS | macOS 26.5.2 |
| Theme | GitHub |
| Path | /chat |
| Tenure | Day 1 |

Start by reproducing the failure at /chat in GitHub Copilot App 1.1.12 on macOS and compare it with starting chat on the webpage. Use the reported authorization message and request ID to determine whether the desktop app incorrectly rejects the account or whether an organization policy is required; done means the cause and user-facing resolution are established.

索引モデルが issue の本文から書いたものです。