Blazor Native viewer exception with Telerik UI for Blazor 12

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Last Updated: 14 Nov 2025 15:40 by ADMIN

Scheduled for 2026 Q1

Kent

Created on: 14 Nov 2025 13:37

Category: Reporting

Type: Bug Report

Blazor Native viewer exception with Telerik UI for Blazor 12

When using the Native Blazor report viewer with the latest version of Telerik UI for Blazor (12.0.0), the following exception is thrown:

Unhandled exception rendering component: Object of type 'Telerik.Blazor.Components.TelerikToolBar' does not have a property matching the name 'Adaptive'.

1 comment

ADMIN

Petar

Posted on: 14 Nov 2025 14:28

Hello everyone,

I have already mentioned this to Kent in the private support ticket he opened. However, for greater visibility, I will also post the response here so that other users who come across this are aware as well.

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This issue occurs due to a breaking change introduced in Telerik UI for Blazor version `12.0.0`, specifically in the ToolBar component, which the Blazor Native Report Viewer internally uses. The Adaptive property was removed in this release, and the viewer has not yet been updated to reflect this change:

Breaking Changes in 12.0.0 | ToolBar

We are aware of the problem and are currently working on a fix. A minor release addressing this compatibility issue is planned for next week.

In the meantime, a potential workaround is to downgrade Telerik UI for Blazor to version `11.3.0`, which is the latest version prior to the breaking change.

We apologize for the inconvenience.

Regards,
Petar
Progress Telerik

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