Fix SharePoint Server 2019 Web Part Not Working in Modern View
Question details
A permissions-management web part stops functioning in Modern View after migrating from older SharePoint environments.
- Product
- SharePoint Server 2019
- Device & OS
- not provided
- Scenario
- Migrating a legacy web part from SharePoint Server 2013 or 2016 to SharePoint Server 2019.
- Observed behavior
- The web part functions correctly in Classic View but fails to load or operate when the page experience is set to Modern View.
Gather your exact web part version details, migration logs, browser information, and any developer console error messages to provide context for troubleshooting.
Use Classic View and Consult Microsoft Q&A
Temporarily revert your page to Classic View to restore functionality while seeking architectural guidance from the Microsoft Q&A community.
SharePoint 2019's Modern View relies on a newer architecture known as the SharePoint Framework (SPFx). This modern structure often lacks backward compatibility with older ASP.NET web parts designed for SharePoint 2013 and 2016.
Navigate to the lower-left corner of your broken SharePoint page and click 'Return to classic SharePoint' to allow the legacy web part to render.
Record the specific web part version, your exact migration steps, browser version, and any specific error codes displayed.
Visit the Microsoft Q&A platform, select the 'SharePoint Server' tag (do not use the SharePoint Online tag), and post your detailed issue for expert evaluation.
Update or Rebuild the Web Part using SPFx
If the web part is critical to your workflow in Modern View, it must be updated or redeveloped to meet modern SharePoint Framework standards.
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Frequently Asked Questions
Why does my SharePoint 2013 web part not work in SharePoint 2019 Modern View?
SharePoint 2019 Modern View utilizes the modern SharePoint Framework (SPFx), which differs significantly from the classic ASP.NET model used in older versions. Legacy web parts lack the architectural updates required to render in this new environment.
Can I permanently force a specific document library to stay in Classic View?
Yes, administrators can configure individual lists or document libraries to default to the classic experience by navigating to Library Settings, selecting Advanced Settings, and changing the List experience option to 'Classic experience'.
Is there a direct replacement for legacy permissions-management web parts?
There is usually no 1:1 out-of-the-box replacement. Depending on your specific requirements, you may need to find a third-party SPFx-compatible app in the SharePoint Store or have a developer rebuild the web part logic using the modern SharePoint Framework.
