The browser or application environment cached the old evaluation state.
All installed @syncfusion packages must share the exact same major and minor version numbers.
: The registerLicense method must be called before any Syncfusion controls are initialized in your application.
var key = Environment.GetEnvironmentVariable("SYNCFUSION_LICENSE_KEY"); SyncfusionLicenseProvider.RegisterLicense(key); syncfusion trial license key fix
If the "Trial" message persists after adding the key, your environment is likely caching the old state. folders (for .NET) or the node_modules/.cache folder (for JS frameworks). Clean and Rebuild the solution. Hard Refresh your browser (Ctrl + F5). Syncfusion 4. Common Troubleshooting Whitespace:
License keys are version-specific. A key for v27.x will not work for v28.x. Log into your Syncfusion Account Select the (e.g., ASP.NET Core, React, Flutter). Select the
Hardcoding license keys is a security risk. Use secure methods to store and inject them. The browser or application environment cached the old
Select the (e.g., ASP.NET Core, React, Flutter) and the Version that matches your installed packages. Copy the generated string. 2. Register the Key in Your Project
In App.xaml.cs (WPF) or Program.cs (WinForms), inside the constructor or OnStartup :
Ethical and Legal Considerations Do not attempt to bypass licensing mechanisms, use unauthorized keys, or distribute modified binaries to avoid activation. Trial licenses exist to allow legitimate evaluation; respecting licensing terms avoids legal and security risks. var key = Environment
// App.xaml.cs namespace YourMauiApp public partial class App : Application public App() InitializeComponent(); // Register license before loading the main page Syncfusion.Licensing.SyncfusionLicenseProvider.RegisterLicense("YOUR_ACTUAL_LICENSE_KEY_HERE"); MainPage = new AppShell(); Use code with caution. Step 3: Clear the Cache and Rebuild
This is where most people fail. You must register before any Syncfusion control is referenced or created.
If your current key is failing, follow these steps to get a fresh one: Log into your account on the Syncfusion website Navigate to the Trial & Downloads Select the Get License Key option for your active trial. Carefully select the from the dropdowns to match your project's environment. The "Community License" Alternative
Syncfusion components offer a robust toolkit for developers, but licensing errors can instantly halt your development workflow. A "Trial License Key" warning or popup usually means your application cannot find, validate, or read your registered license key.