Termbox logs counts errors in wikibase.view.TermboxRemoteRenderer.requestError. The error in the parent ticket and its fix can be seen in that metric:
There currently exists no dashboard/graph for it. One should be created.
- a dashboard tracking that exists and is linked on https://wikitech.wikimedia.org/wiki/WMDE/Wikidata/SSR_Service
- considered adding an alert for a sensible threshold for that metric
- if such an alert is added, consider adding it somehow to https://grafana.wikimedia.org/d/TUJ0V-0Zk/wikidata-alerts?orgId=1