Your ROOT_URL in app.ini is https://git.cloudchain.link/ but you are visiting https://dash.bss.nz/open-source-mirrors/homepage/blame/commit/f64aa50cc0b70bd05a29f932ecac539eef32a5c4/docs/widgets/services/tailscale.md
You should set ROOT_URL correctly, otherwise the web may not work correctly.
You will need to generate an API access token from the [keys page](https://login.tailscale.com/admin/settings/keys) on the Tailscale dashboard.
To find your device ID, go to the [machine overview page](https://login.tailscale.com/admin/machines) and select your machine. In the "Machine Details" section, copy your `ID`. It will end with `CNTRL`.