Thanks smacdonald2008​

yes, it works fine on component dialog but when I am using it in workflow dialog specifying the cq:dialog path to it it gives the above error.

I saw it is working fine on page properties (on/off) fields.

Hi All,We are upgrading to AEM 6.4 currently and as a part of repository restructuring  we have moved all the workflow related data to "/conf/global/settings/workflow", during this we also moved out date picker dialog to this folder.after moving that we are getting error touchUiDialogPath' property ...

You can try dragging and dropping an image into the parsys area and then you would be able to edit the component.Hope this solved the problem.