Hi @Swarna_Kadagadkai ,
I understand you are upgrading from FDK 8.7.6 to FDK 9 and post-upgrade facing this issue. Did you manage to remove the old ~/.fdk folder prior to upgrade as mentioned in here. If not done already, remove the ~/.fdk directory, use Node 18 version, update NPM to latest and then reinstall FDK.
Optionally you can refer to this guide
Regards,
Thakur