Issue Report: Plotting Engine Fails to Generate Charts

Summary The chart‑generation feature in Copilot intermittently fails to produce output. When requesting visualizations such as radar charts, bar charts, histograms, or other plotted graphics, Copilot often returns an empty result with no error message or explanation.

Observed Behavior

• Requests for plotted charts sometimes return "" (empty output).
• No error message is provided, making troubleshooting impossible.
• The failure occurs even with simple, valid datasets and straightforward instructions.
• Conceptual or AI‑generated diagrams work consistently; only plotted charts fail.

Expected Behavior Copilot should reliably generate charts when provided valid data and instructions, or provide a clear error message if the request cannot be completed.

Impact This issue prevents users from visualizing structured datasets and reduces confidence in Copilot’s ability to produce quantitative graphics. It also forces users to retry multiple times or switch to non‑chart visualizations.

Request Please investigate the stability of the chart‑generation environment, particularly around sandbox execution and rendering reliability. Adding explicit error messages when chart generation fails would also significantly improve usability.