Keys are version-dependent. A license key generated for version 24.x will not work if you upgrade your NuGet packages to version 25.x. Where to Find the Official Syncfusion Unlock Key Link
Ensure the license key version matches the Syncfusion NuGet package or NPM package version you are using. A newer key usually works on older versions, but older keys will not work on newer versions 1.2.3 . syncfusion unlock key link
Note: For modern development workflows, utilizing NuGet packages or npm packages instead of the installer reduces the need for the installer unlock key. Keys are version-dependent
// Register Syncfusion license Syncfusion.Licensing.SyncfusionLicenseProvider.RegisterLicense("YOUR_YOUR_GENERATED_KEY_HERE"); Use code with caution. JavaScript / TypeScript Applications A newer key usually works on older versions,
What an Unlock Key Is An unlock key is a unique alphanumeric token issued by Syncfusion to a licensed customer. It ties a particular copy or deployment of Syncfusion components to a license entitlement, enabling licensed features and removing evaluation limitations, expiration notices, and trial restrictions. Unlock keys may be applied during development, at build time, or on deployed servers depending on the product and platform. For some Syncfusion products, license activation is done via a NuGet package, configuration file, environment variable, or code-based registration using the unlock key string.
Syncfusion Unlock Key Link: A Complete Guide to Activating Your Controls