@D V Sandeep 

there is something wrong in your client script.

I already shared a working solution with you

share your scripts and screenshots of that script here

💡 If my response helped, please mark it as correct and close the thread 🔒— this helps future readers find the solution faster! 🙏

Regards,
Ankur
Certified Technical Architect  ||  10x ServiceNow MVP  ||  ServiceNow Community Leader