Most developers lose hours because they register the key in the wrong place or forget that CI/CD machines lack the registry key. By moving your license registration to environment variables and the RegisterLicense method at the application entry point, you will never see the "Trial Expired" error again.
In Visual Studio, go to Build > Clean Solution .
Syncfusion license keys are tightly coupled with specific major versions. A key generated for version 24 will not work if your code references version 25. syncfusion trial license key fix
If you are seeing a recurring trial watermark or receiving a "License is invalid" exception in your application, your Syncfusion license registration is failing. Syncfusion requires explicit license key registration in your code for all platforms. Here is how to fix the trial license key issue permanently. Why the Trial Error Happens
Open your project's package manager (e.g., package.json , .csproj , or NuGet Package Manager). Check the exact version number of the Syncfusion packages. Most developers lose hours because they register the
To overcome these limitations, you can try the following methods:
Here is how to register the key across different popular frameworks: .NET Core / ASP.NET Core / Blazor Syncfusion license keys are tightly coupled with specific
You tried the above, but the red error banner still appears. Let’s debug.
What are you building for (e.g., Blazor, MAUI, ASP.NET Core)?