Syncfusion Trial License Key Fix Jun 2026

You registered a trial key that has expired. You need to:

that matches the NuGet/NPM packages installed in your project. Copy the generated string. Syncfusion 2. Register the Key in Code

import LicenseManager from '@syncfusion/ej2-base'; syncfusion trial license key fix

This is the most common error. It appears when your application uses Syncfusion components but hasn't registered a valid license key or when your 30-day trial period has concluded.

For Blazor applications, register the license inside your Program.cs file. Place it before builder.Build(); . You registered a trial key that has expired

If a simple registration doesn't fix the issue, try these advanced diagnostics.

"The included Syncfusion® license key is invalid." Syncfusion 2

I notice you're asking about a "Syncfusion trial license key fix" — this raises some concerns, as it could imply trying to bypass or extend a trial license improperly.

Clean and rebuild the solution to clear cached license warnings.

Syncfusion requires explicit license registration at runtime for versions 16.2 and higher. The warning appears due to three main reasons: