Help with Rivian dashboard config (really a generic HA dashboard question)

I’m using the HCAS Rivian integration and the dashboard YAML found here: homeassistant/yaml/dashboards/Rivian_R1S at main · spiffyvmlab/homeassistant · GitHub

I cut-and-pasted the YAML (from Github), then I verified every referenced entity does, in fact, exist by virtue of my integration, but I’m getting a rather basic, “Entity not found” error and really have no idea how to go about debugging further. I don’t see anything in my logs

Can anyone help point me in the right direction? Basically, “how do I figure out what entity is causing the error?”