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Resolving the invalid Syncfusion license due to platform mismatch for Blazor

Platform: Miscellaneous |
Control: Extension

Resolving the invalid Syncfusion license due to platform mismatch for Blazor


The Blazor application displays the “Syncfusion license is invalid (Platform mismatch)” message at runtime, even when you registered with the valid Syncfusion Blazor license key in Startup.cs file. This happens, if the application is developed with Syncfusion Blazor component and referred with the Syncfusion NuGet packages version from NuGet.org.


Licensing error message in Blazor

Fig: Syncfusion licensing error message

Syncfusion republished the modified Syncfusion.Licensing NuGet package version on 20th December 2019 in NuGet.org. If you referred the Syncfusion licensing NuGet package on or before 20th December 2019, please perform the following steps to resolve this problem.


  1. Download the Syncfusion.Licensing package and extract the downloaded zip file.
  2. Run the start.bat file to replace the modified Syncfusion.Licensing package into NuGet cache location.
  3. Open the Blazor application in Visual Studio, for which you are receiving the “Syncfusion license is invalid (Platform mismatch)” message.
  4. Right-click the solution file in the Solution Explorer and select the Clean Solution.
  5. Make sure whether the valid Syncfusion Blazor license key is registered in Startup.cs file of the application. Refer to the user guide to know about the license key generation and register in application. 
  6. Compile and run the application to avoid the licensing error message.
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Paul VanRoosendaal
Dec 19, 2019

Can we wait for the package update instead of doing the workaround?


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