For whatever strange reason it is, my project starts to hit error in string.cs overflow exception after upgrade to 13.0.0.
It is fine when I downgrade it back to 12.3.0.
There are no changes in the code, merely changing the version to 13.0.0 will hit error.
Anybody experiencing this?
Hristian Stefanov
Telerik team
commented on 17 Mar 2026, 09:48 AM
Hello,
Thank you for sharing more details about your scenario. To help you resolve the stack overflow error that appears after upgrading from 12.3.0 to 13.0.0 of Telerik UI for Blazor, here are some focused troubleshooting steps and important notes:
Key Information Needed
To further investigate, please provide:
Which Telerik components are used on the affected pages.
Any specific user actions or navigation patterns that seem to trigger the error.
Troubleshooting Steps
Clear Browser and Server Cache: Upgrading can leave old scripts cached, causing conflicts. Clear your browser cache and restart the server to ensure the latest resources are loaded.
Check for JavaScript Errors: Open the browser’s developer console and look for JavaScript errors, especially ones like Cannot read properties of null (reading 'addEventListener'). This often points to an issue with component initialization or script loading.
Component Version Consistency: Make sure all Telerik UI for Blazor NuGet packages in your solution are updated to 13.0.0. Mixing versions can lead to runtime errors.
Isolate the Problem: If possible, reproduce the issue in a smaller test project. This can help identify if a specific usage pattern or component is causing the problem.
If these steps do not resolve the issue, please provide the requested additional details. This will allow me to offer a more targeted solution.
Hello,
Thank you for sharing more details about your scenario. To help you resolve the stack overflow error that appears after upgrading from 12.3.0 to 13.0.0 of Telerik UI for Blazor, here are some focused troubleshooting steps and important notes:
Key Information Needed
Troubleshooting Steps
https://learn.microsoft.com/en-us/aspnet/core/blazor/host-and-deploy/webassembly/http-caching-issues?view=aspnetcore-8.0
https://docs.telerik.com/blazor-ui/troubleshooting/js-errors
If these steps do not resolve the issue, please provide the requested additional details. This will allow me to offer a more targeted solution.
Kind Regards,
Hristian