blazor-docs/knowledge-base/common-maximum-call-stack-exceeded.md

title	description	type	page_title	slug	tags	ticketid	res_type
JSException Maximum Call Stack Size Exceeded	Learn what causes the Maximum call stack size exceeded error and how to fix it.	troubleshooting	How to Fix JSException Maximum Call Stack Size Exceeded	common-kb-maximum-call-stack-exceeded	telerik, blazor, troubleshooting, javascript, js-error, exception	1641599, 1638959, 1639186, 1638288, 1642561, 1645266, 1641021	kb

Environment

Product

UI for Blazor

Description

This knowledge base article deals with the Maximum call stack size exceeded error.

Error Message

Microsoft.JSInterop.JSException: Maximum call stack size exceeded

RangeError: Maximum call stack size exceeded

Cause

The possible causes for the Maximum call stack size exceeded error are:

• Using an old version of Telerik UI for Blazor (4.5.0 and older) in .NET 8 or 9.
• Updating an existing app to .NET 8 or 9 without updating Telerik UI for Blazor.
• Using different versions of Telerik UI for Blazor in different projects in your solution. Some of the versions are earlier than 4.6.0.
• Building a .NET 6 Telerik Blazor app with the .NET 8 SDK on a Mac.
• Using a cached old version of telerik-blazor.js with up-to-date Telerik UI for Blazor version. In this case, the app may be runnable in one browser and not in another.

Solution

To resolve the error:

• Use a Telerik UI for Blazor version, which is [compatible with .NET 8]({%slug system-requirements%}#supported-net-versions).
• Clear the browser cache and [add a cache buster for the Telerik CSS and JavaScript files]({%slug common-kb-browser-cache-buster%}).

Clearing the browser cache will reload the telerik-blazor.js file and the error should go away.

If the Telerik UI for Blazor version is up-to-date and the error persists, then clean the solution:

1. Close Visual Studio.
2. Delete all bin and obj folders in all projects in the solution.
3. Clear the browser cache.
4. Reopen Visual Studio and rebuild the app.

Notes

If you receive a TelerikBlazor was undefined JavaScript error after you clear the browser cache, then refer to the [documentation about TelerikBlazor was undefined]({%slug troubleshooting-js-errors%}#telerikblazor-was-undefined).

See Also

• [Troubleshoot JavaScript Errors]({%slug troubleshooting-js-errors%})