In Visual Studio, go to Build > Clean Solution .
Does the key version match your NuGet package version exactly? Have you cleared your bin and obj folders?
import 'package:syncfusion_flutter_core/core.dart'; void main() { // Register your license key SyncfusionLicenseProvider.registerLicense('YOUR_ACTUAL_KEY_HERE'); runApp(MyApp()); } Use code with caution. Step 3: Clearing the Cache (The "Invisible" Fix) syncfusion trial license key fix
The "Syncfusion trial license key fix" is version-sensitive.
Manually delete the bin and obj folders in your project directory. In Visual Studio, go to Build > Clean Solution
import { registerLicense } from '@syncfusion/ej2-base'; // Registering Syncfusion license key registerLicense('YOUR_ACTUAL_KEY_HERE'); Use code with caution. For Flutter Add the registration in your main() function:
Sometimes you apply the code fix, but the trial warning remains. This is often due to cached build artifacts. import 'package:syncfusion_flutter_core/core
The key is for an older or newer version than the NuGet packages you've installed.
A license key generated for v24.x will not work for v25.x. If you upgrade your NuGet packages, you must log back into the Syncfusion portal and generate a new key for that specific version.