A thing that I always miss when building dashboards is the ability to put multiple cards into one frame. I can put cards in a vertical stack for example but they will look like totally separate cards, there’s no visual grouping. The closest thing so far is the entities card with its various row types.
But now I saw this post by @petro, which I think is exactly what I need. I’m trying out this syntax, but something must be different about my setup because I’m getting errors: