> ## Documentation Index
> Fetch the complete documentation index at: https://learn.nextedy.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Troubleshooting

> This section provides solutions for common Nextedy GANTT issues.

export const LastReviewed = ({date}) => {
  if (!date) return null;
  const formatted = new Date(`${date}T00:00:00Z`).toLocaleDateString("en-US", {
    year: "numeric",
    month: "long",
    day: "numeric",
    timeZone: "UTC"
  });
  return <p className="mt-10 text-sm text-gray-400 dark:text-zinc-500 not-prose">
      Last reviewed on {formatted}
    </p>;
};

<Columns cols={3}>
  <Card title="Troubleshooting Installation Issues" icon="file" href="/gantt/guides/troubleshooting/installation-issues">
    Resolve problems after installing or upgrading the Gantt extension, including missing widget errors.
  </Card>

  <Card title="Troubleshooting Blank or Non-Loading Gantt" icon="file" href="/gantt/guides/troubleshooting/blank-gantt">
    Diagnose and fix situations where the Gantt chart fails to display or shows a loading screen.
  </Card>

  <Card title="Troubleshooting Save Failures" icon="file" href="/gantt/guides/troubleshooting/save-failures">
    Fix issues where changes made in the Gantt chart fail to persist to Polarion.
  </Card>

  <Card title="Troubleshooting Script Errors" icon="file" href="/gantt/guides/troubleshooting/script-errors">
    Identify and resolve errors in item scripts, config scripts, and marker scripts.
  </Card>

  <Card title="Troubleshooting Reviewer Access Issues" icon="file" href="/gantt/guides/troubleshooting/reviewer-access">
    Fix permission problems when users have read-only access instead of edit access.
  </Card>

  <Card title="Troubleshooting Today Marker Position" icon="file" href="/gantt/guides/troubleshooting/today-marker-position">
    Understand and fix the today marker showing an incorrect date due to timezone differences.
  </Card>
</Columns>

**[Troubleshooting Performance Issues](/gantt/guides/troubleshooting/performance)** -- Diagnose slow loading and rendering issues with large datasets.

**[Troubleshooting Calendar Integration Issues](/gantt/guides/troubleshooting/calendar-issues)** -- Resolve problems with working calendars, holidays, and per-user schedules.

<Tip title="General troubleshooting approach">
  For any Gantt issue, start by checking the Gantt footer for error indicators (triangle icon) and item count statistics. Open the browser console (right-click > Inspect > Console) for detailed error messages. When contacting support, include the browser console output and your widget parameter configuration.
</Tip>

<LastReviewed date="2026-07-02" />