JSON issue for new card visual

SDittmannFleet 

I have struggled for several days with an equal problem. Then I found the solution.

For some elements you have to define:
"$id": "default"

After these changes my JSON worked. Hope this works for you too.

"cardVisual": {
      "*": {
        "padding": [
          {
            "top": 0,
            "left": 0,
            "right": 0,
            "bottom": 0
          }
        ],
        "value": [
          {
            "fontSize": 18,
            "fontColor":{
              "solid": {
                "color": "#FFFFFF"
              }
            },
            "horizontalAlignment": "center",
            "$id": "default"
          }
        ],
        "label": [
          {
            "fontSize": 10,
            "fontColor":{
              "solid": {
                "color": "#FFFFFF"
              }
            },            
            "horizontalAlignment": "center",
            "position": "belowValue",
            "$id": "default"
          }
        ],
        "fillCustom": [
          {
            "show": true,
            "fillColor":{
              "solid": {
                "color": "#4c9896"
              }
            },
            "$id": "default"
          }
        ]
      }
    }