Hi @ranjiths1994
Thank you so much for using our community.
Regarding your issue, please make sure that you downloaded the full SDK (zip folder) for KV46 from here: https://mcuxpresso.nxp.com/en/select
And then, please be sure that you dragged and dropped the zip folder right here on your MCUXpresso IDE and you have correctly installed the SDK for that MCU:

If the problem persists, please let me know your comments or if you have more questions.
Best Regards.
Pablo Avalos.