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/6de20f0ab6902d208ff1413750796e7071dd15f7/docs/widgets/services/prometheus.md You should set ROOT_URL correctly, otherwise the web may not work correctly.
homepage/docs/widgets/services/prometheus.md

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title description
Prometheus Prometheus Widget Configuration

Allowed fields: ["targets_up", "targets_down", "targets_total"]

widget:
    type: prometheus
    url: http://prometheushost:port