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/2ee5fd123b2ed5253ca9d3328f27d99a8c908780/docs/widgets/services/emby.md
You should set ROOT_URL correctly, otherwise the web may not work correctly.
You can create an API key from inside Emby at `Settings > Advanced > Api Keys`.
As of v0.6.11 the widget supports fields `["movies", "series", "episodes", "songs"]`. These blocks are disabled by default but can be enabled with the `enableBlocks` option, and the "Now Playing" feature (enabled by default) can be disabled with the `enableNowPlaying` option.