Copilot dissapeared while working in two terminals, now won't run, says it is not installed. Ubuntu 24.04 LTS Guake and Terminal.

On my first try of copilot, I was thrilled by its performance. It made a gist for me containing commands etc. I made a macro for me to invoke it with one word. It was great. Then it dissapeared, never to return.

**What happened:**
Using Guake, it was making a gist with keyboard commands, help tips, often used routines etc, and made it availble in Terminal.
Then copilot dissapeared from Guake as I was using it. My hands were on my keyboard a the time, its not impossible I inadvertently touch the q ket, or it crashed - I can't be sure.

_Side note_ - Copilot had said I must log in and out of Gnome desktop to make permanent some edits it made. I said no as I have an open project in use.ai in Chrome that was paused for 24 hours because of use,ai's unbeleivable nasty token cutoff nonsense. I need to continue that this afternoon.

Ater it dissapeared, on trying to reload it in Guake, it said it copilot was not installed, install it with snap.
I have never used snap, I installed it with curl, and I still use apt-install for installs on Ubuntu.
So I double clicked the app instead, it gave an auth code, the code was accepted, but still no copilot. That happened a few times, now it tells me I need an account, which I have. Stuck.
Copilot's online help ai tells me it is too scared to help.

Copilot had been joyfully rewiring stuff under the hood, but the session is no longer available, I can't track what it did to undo it.
Any ideas?
Bear in mind I've only used copilot for a couple of hours, not exactly familiar with it.

Báo cáo nêu Ubuntu 24.04, Guake và Terminal, việc cài đặt curl, cùng một luồng auth-code, nhưng không có tệp nào trong repository hoặc bài kiểm thử bị lỗi. Hãy bắt đầu bằng cách tái hiện hiện tượng biến mất và các lỗi “not installed” hoặc lỗi tài khoản trong thiết lập đó; được xem là hoàn tất khi xác định được nguyên nhân đáng tin cậy và ghi lại cách khôi phục.

Do mô hình lập chỉ mục viết ra từ nội dung của issue.