Hey all,
Believe it or not, this is the first time since I started using HA that I came across this issue. I've updated one of my custom cards, and now instead of the card, the UI shows a stand-in saying "configuration error".
The point is, according to the documentation of the card, the configuration in the yaml should be correct. I've already checked, there doesn't seem to be anyting in the logs that seems to be relevant to that card. Where can I find the information about what problem the renderer has with it?