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+---
+title: TypeLoadException Could not Resolve Type with Token
+description: Learn how to resolve a TypeLoadException Could not Resolve Type with Token runtime exception in Blazor WebAssembly apps.
+type: troubleshooting
+page_title: How to Fix TypeLoadException Could not Resolve Type with Token in Blazor WebAssembly Apps
+slug: common-kb-could-not-resolve-type-with-token
+tags: telerik, blazor, TypeLoadException
+ticketid: 1679052, 1661487, 1637003
+res_type: kb
+---
+
+## Environment
+
+<table>
+    <tbody>
+        <tr>
+            <td>Product</td>
+            <td>UI for Blazor</td>
+        </tr>
+    </tbody>
+</table>
+
+## Description
+
+This KB article discusses runtime exceptions that may occur in Blazor client-side WebAssembly apps and are similar to:
+
+* `Unhandled exception rendering component: Could not resolve type with token ... from typeref (expected class 'Telerik.Blazor.Components...' in assembly 'Telerik.Blazor')`
+* `System.TypeLoadException: Could not resolve type with token ... from typeref (expected class 'Telerik.Blazor.Components...' in assembly 'Telerik.Blazor') at Microsoft.AspNetCore.Components.ComponentBase...(RenderTreeBuilder builder)`
+
+The error may occur after upgrading the version of .NET or Telerik UI for Blazor. The exact expected class and stack trace can differ.
+
+## Cause
+
+Runtime type load or resolution errors are usually related to:
+
+* Application build cache
+* Browser WebAssembly cache
+
+## Solution
+
+1. Close Visual Studio.
+1. Delete all **bin** and **obj** folders in the app.
+1. Clear the browser cache.
+1. Restart Visual Studio and rebuild the app.
+
+## See Also
+
+* [Troubleshoot general issues with Telerik UI for Blazor](slug:troubleshooting-general-issues)
+* [Troubleshoot JavaScript errors related to Telerik UI for Blazor](slug:troubleshooting-js-errors)