Follow these steps to generate and apply a valid license key to eliminate the trial errors. 1. Retrieve the Matching License Key Log into your . Navigate to the License & Downloads section. Select Downloads & Keys . Click Get License Key .
Syncfusion.Licensing.SyncfusionLicenseProvider.RegisterLicense("YOUR_ACTUAL_LICENSE_KEY"); Use code with caution. For Flutter
public App() // Register Syncfusion license Syncfusion.Licensing.SyncfusionLicenseProvider.RegisterLicense("YOUR_TRIAL_KEY_HERE"); InitializeComponent(); MainPage = new AppShell(); Use code with caution. Blazor (Server & WebAssembly)
The most common error you'll encounter is a popup that appears when you launch your application, stating:
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You must register the license key before any Syncfusion components are rendered. Here is where to apply the fix based on your tech stack. For ASP.NET Core / Blazor
This is a frequent culprit, especially after upgrades. If your license key is for version v29 but your project references v30 assemblies, you'll encounter validation errors. Syncfusion license keys are major version and platform-specific.
Complete Guide to Fixing Syncfusion Trial License Key Errors
This error triggers when you've registered a key, but it's incorrect, belongs to a different Syncfusion version, or is intended for another platform (e.g., using a Windows Forms key in a Blazor app). Follow these steps to generate and apply a
Manually delete the bin and obj folders inside your project directory.
Ensure all Syncfusion NuGet or NPM packages share the exact same version number. Mixing different version numbers causes verification failure.
Ensure all Syncfusion NuGet packages or npm assemblies in your project share the .
import registerLicense from '@syncfusion/ej2-base'; registerLicense('YOUR_KEY_HERE'); Use code with caution. Copied to clipboard 3. Align Package Versions Navigate to the License & Downloads section
Select the specific Platform and Version that matches the NuGet packages in your project (e.g., v25.1.xx). Copy the generated string. Step 2: Where to Place the Fix (By Platform)
If you're experiencing issues with Syncfusion trial license keys, you may want to consider alternative solutions, such as:
Clean and rebuild your solution. Run the application to verify the license popup is gone.
You need to register the license in the entry point of your application (usually index.js , app.component.ts , or main.js ).