I have not configured anything new in pega 7.3,We have just upgraded from 7.1 to 7.3 .In 7.1 it is working fine but in 7.3 it is not working, Please find the screenshot below. Please advice whether we need to apply any hotfix or we need to create the section in work class.
I tried to traced but I am not getting any error message on log or at UI or at tracer .Please check the screenshot of tracer as well as screenshot of UI after click on button. On click of delete button ,system is displaying one Dark screen. Please refer the attachment.
As you suggested i updated the harness rule to set the "Enable client-side template UI" to No. Still popup window is not opened. we are opening the popup window on click on button. on click on button we are using a local action and target as Modal Dialog.