Syncfusion Trial License Key Fix [upd] Jun 2026

Hardcoding license keys is a security risk. Use secure methods to store and inject them.

The license key you generated does not match the exact version of the Syncfusion packages installed in your project.

Your license key is for version 21.x, but your NuGet packages are 22.x. syncfusion trial license key fix

Store your trial key in an environment configuration file ( .env or appsettings.json ) and pull it dynamically at runtime. ASP.NET Core / Blazor Example: "SyncfusionKey": "YOUR_HIDDEN_LICENSE_KEY" Use code with caution.

Which are you building on? (e.g., Blazor, React, ASP.NET Core) What version of Syncfusion packages do you have installed? What exact error message or behavior are you seeing? Hardcoding license keys is a security risk

Occasionally, a corrupted package metadata causes issues. Run dotnet nuget locals all --clear . Rebuild: Perform a fresh Rebuild of the project. Important Versioning Rules

: Sometimes, registering your trial might extend the evaluation period or provide additional benefits. Look for a "Register Trial" option in your Syncfusion account or in the product. Your license key is for version 21

Troubleshooting the Syncfusion "Trial License Key" Message: A Complete Fix Guide

Place this code inside the main() function of your main.dart file:

Select the and the Exact Version that matches your project files. Do not guess; ensure the major numbers match perfectly. Step 2: Correctly Register the Key in Code