Hi Vivek, You might see that error if ACS Commons is installed(it has custom multi field implementation) or any other custom multi-field implementation. Make sure you have only one implementation of below code.CUI.Multifield = new Class({_addListeners: function () {}});  CUI.Widget.registry.register...

Hi Vivek,Here is the link to the package:eaem-touch-ui-nested-multi-field-node-store-63.zip - Google Drive