Your ROOT_URL in app.ini is https://git.cloudchain.link/ but you are visiting https://dash.bss.nz/open-source-mirrors/homepage/src/commit/1a724732c84b17713efa4006773edf29687d6181/docs/widgets/services/fritzbox.md You should set ROOT_URL correctly, otherwise the web may not work correctly.
homepage/docs/widgets/services/fritzbox.md

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title description
FRITZ!Box FRITZ!Box Widget Configuration

Application access & UPnP must be activated on your device:

Home Network > Network > Network Settings > Access Settings in the Home Network
[x] Allow access for applications
[x] Transmit status information over UPnP

Credentials are not needed and, as such, you may want to consider using http instead of https as those requests are significantly faster.

Allowed fields (limited to a max of 4): ["connectionStatus", "uptime", "maxDown", "maxUp", "down", "up", "received", "sent", "externalIPAddress"].

widget:
  type: fritzbox
  url: http://192.168.178.1