I got table in Superset 4.0.0 wit cell bars:

I want set different colors for bars for every column.

I’m trying to use this code in json metadata:

# default code
{
  "chart_configuration": {
    "937": {"id": 937, "crossFilters": {"scope": "global", "chartsInScope": []}}
  },
  "global_chart_configuration": {
    "scope": {"rootPath": ["ROOT_ID"], "excluded": []},
    "chartsInScope": [937]
  },
  "color_scheme": "bnbColors",
  "refresh_frequency": 0,
  "expanded_slices": {},
  "label_colors": {},
  "timed_refresh_immune_slices": [],
  "cross_filters_enabled": true,
  "default_filters": "{}",
  # my code
  "cell_styling": {
    "table": {
      "columns": {
        "plan": {"backgroundColor": "#ff0000"},
        "fact": {"backgroundColor": "#00ff00"}
      }
    }
  }
}

Then I apply changed metadata I got no errors.

Then I trying to save changes, I got error:

Sorry, there was an error saving this dashboard: [object Object]

How to solve this problem?