While SketchUp stopped selling "Classic" (perpetual) licenses in November 2020, some older network or enterprise licenses might still use these codes for specific version support. Gestión de licencias | SketchUp Help
Si tienes una suscripción activa, sigue estos pasos para autorizar tu copia:
Al abrir SketchUp Pro 2023 por primera vez, aparecerá la ventana de bienvenida.
SketchUp Pro 2023 , the licensing system has shifted away from traditional serial numbers and authorization codes. Since 2020, SketchUp has transitioned to a subscription-based model that relies on your Trimble ID for activation. SketchUp Community How to Activate SketchUp Pro 2023
Instead of a code, you activate your software by signing in. Here is the legitimate process as outlined in the SketchUp Help Center : Classic license - SketchUp Forum