Updating code error

I want to remove this code from the form located at https://creator.zoho.com/essistmgmt/form/1696/scriptbuilder/ field action on the SITE_VISIT_SCHEDULED_NTU_CPE_INSTALL_COMPLETED_DATETIME field

if (input.SITE_VISIT_SCHEDULED_NTU_CPE_INSTALL_COMPLETED_DATETIME != null)

{

input.DETAILED_STATUS_PHASED_OUT = "7";

}

But I am getting the following error message

Error Occurred. We are sorry for the inconvenience.

Please try after some time or refresh the page and try again.

The application is available for editing. I think the script is corrupt, can you please resolve?