How do I see a Lovelace "configuration error"

I expected the answer to be that I should browse to http://homeassistant:8123/config/logs … except that it doesn’t show anything about a configuration error.

“Oh,” I thought. Must need to show raw / detailed logs. But no, when selecting “raw logs”, even the messages that were showed on the condensed screen go away, replaced with “No errors have been reported.”

While I’m complaining about the online log system, am I the only one who gets an error when attempting to download the log?

Background: I’m trying to add a custom:plotly-graph for the first time. I’ve reloaded yaml and have a very simple initial config that Lovelace is complaining about:

        - type: custom:plotly-graph
          entities:
            - entity: sensor.ibbq_6_temperature_probe_4
              hours_to_show: 4h
              refresh_interval: auto

I am not using this card but probably it should be

type: custom:plotly-graph
entities:
  - entity: sensor.xxx
hours_to_show: 4h
...

i.e. the “hours_to_show” is a global (not per entity) option.

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Unfortunately that doesn’t work. I tried with and without hour_to_show at the correct indention. So… my Lovelace “configuration error” remains… :confused:

Post a screenshot with UI editor with your code and the error.

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I’m using yaml mode, but your post prompted me to try it in GUI mode - which said the card wasn’t loaded. I fixed that, and now it works - so thanks.

If only the error message had said that to begin with!