Syncfusion Trial License Key Fix Jun 2026

Hardcoding keys in source control can cause failures if different environments pull different package updates.

: Licensing errors often stem from having multiple versions of the same Syncfusion package. : Delete the node_modules folder and package-lock.json (or equivalent), clear your package manager cache (e.g., npm cache clean --force

The core code to register a license is universally:

Now that we've decoded the messages, let's systematically fix the problem. The solution will depend on your specific situation, so follow the path that best matches your needs. syncfusion trial license key fix

Check your package manager (NuGet, NPM, or Pub) for the exact version number of your Syncfusion libraries. Generate a new key matching that exact version. Duplicate Platform Registrations

If you are an individual developer or a small company (less than 5 employees/

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. Hardcoding keys in source control can cause failures

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:

: Register the license key in the Program.cs file of your ASP.NET Core application as shown above.

Syncfusion keys are version-specific down to the minor release. Go back to the Syncfusion portal, select the exact version of the package you are using, and generate a new key. Watermark Still Appears After Registration The solution will depend on your specific situation,

What are you building for (e.g., Blazor, MAUI, ASP.NET Core)?

Before you can register a key, you need one. If you don't already have a license, follow these simple steps:

to catch missing keys before deployment:

For legacy .NET Framework applications, register the key inside the global application startup file.

Syncfusion Trial License Key Fix: A Complete Guide to Licensing