Javascript exception in CMS when adding eforms field via drag and drop

Wicket.Ajax:  Wicket.Ajax.Call.processEvaluation: Exception evaluating javascript: TypeError: Cannot read property 'setAttribute' of null, text: (function(){Wicket.Ajax.ajax({"c":"storeformdata8c","ad":true,"u":"./?1-1.IBehaviorListener.0-root-tabs-panel~container-cards-2-panel-center-tabs-panel~container-cards-1-panel-editor-extension.editor-form-template-layout.form-layout.extensions-view-1-item-storeformdata","e":"change","m":"POST"});})();(function(){Wicket.Ajax.ajax({"c":"successText8d","ad":true,"u":"./?1-1.IBehaviorListener.0-root-tabs-panel~container-cards-2-panel-center-tabs-panel~container-cards-1-panel-editor-extension.editor-form-template-layout.form-layout.extensions-view-2-item-successText","e":"inputchange change","m":"POST"});})();(function(){Wicket.Ajax.ajax({"c":"successURL8e","ad":true,"u":"./?1-1.IBehaviorListener.0-root-tabs-panel~container-cards-2-panel-center-tabs-panel~container-cards-1-panel-editor-extension.editor-form-template-layout.form-layout.extensions-view-2-item-successURL","e":"inputchange change","m":"POST"});})();(function(){Wicket.Ajax.ajax({"pre":[function(attrs){return Wicket.Choice.acceptInput('cards:1:panel:editor:extension.editor:form:template:layout.form:layout.extensions:view:2:item:successmode', attrs)}],"c":"successmode8f","ad":true,"u":"./?1-1.IBehaviorListener.0-root-tabs-panel~container-cards-2-panel-center-tabs-panel~container-cards-1-panel-editor-extension.editor-form-template-layout.form-layout.extensions-view-2-item-successmode","e":"click","m":"POST","dep":[function(attrs){return Wicket.Choice.getInputValues('cards:1:panel:editor:extension.editor:form:template:layout.form:layout.extensions:view:2:item:successmode', attrs)}]});})();(function(){Wicket.Ajax.ajax({"c":"limit90","ad":true,"u":"./?1-1.IBehaviorListener.0-root-tabs-panel~container-cards-2-panel-center-tabs-panel~container-cards-1-panel-editor-extension.editor-form-template-layout.form-layout.extensions-view-3-item-limit","e":"inputchange change","m":"POST"});})();(function(){Wicket.Ajax.ajax({"c":"limittext91","ad":true,"u":"./?1-1.IBehaviorListener.0-root-tabs-panel~container-cards-2-panel-center-tabs-panel~container-cards-1-panel-editor-extension.editor-form-template-layout.form-layout.extensions-view-3-item-limittext","e":"inputchange change","m":"POST"});})();(function(){Wicket.Ajax.ajax({"pre":[function(attrs){return