Hello @dnyansh321,

Welcome to the Autodesk Community!

Please check out the following solutions:

Activation Error 0015.111 when trying to activate your Autodesk license.

Reset Activation for an Autodesk Product -- Stand-Alone License with Single-User Access

If this does not help, please contact our Registration & Activation team, so they can troubleshoot further. Go to Contact Support - Activation & Registration, then ask AVA (our Virtual Agent). If AVA can't help, it will redirect you to the Registration & Activation team, which you can contact via Chat or E-mail.

Regards,