Troubleshooting

Problem	Check
Chart is blank	Confirm the GameObject has ChartGraphic or another host, has a valid size, and has marks from code or a data source.
No data appears from a source	Confirm the data source targets the correct chart, then click Generate or Refresh. For file/web sources, inspect ChartDataMapping.
Axes look wrong	Check chart type, bar orientation, domain, scale type, category labels, and whether the chart type hides axes by design.
Legend is missing	A legend needs series or foreground style keys. Use semantic ForegroundStyle values or set LegendPosition to a visible value.
Labels overlap	Reduce visible labels, rotate axis labels, shorten category names, use a wider chart, or use label collision settings.
Live chart allocates or stutters	Prefer SetValues or RingBufferChartDataSource, reduce label count, disable overlapping animations, and avoid recreating chart objects every frame.
UI Toolkit chart does not update	Confirm ChartGuruElement is bound to the intended data source or binder, and that the data source raises DataChanged after refreshing.