Hello @pratayay123 ,
If you installed the Support package, if you go to the Support Package folder, and run the NXP_Support_Package_S32K1xx.m file, the installer window will popup. Here you have to follow all the steps from the buttons there. You have to go to NXP website and download the MLTBX file, get the license and activate it. Hope the following image gives you a good starting point.

Hope this helps,
Marius