ckez.wpd:374 Uncaught TypeError: Cannot read properties of undefined (reading 'frameElement')
    at CKEDITOR.editor.resize (ckez.wpd:374:338)
    at init._syncSize (ckez.wpd:1624:11)
    at init.onShow (ckez.wpd:1589:9)
    at _invoke (zk.wpd:15655:14)
    at init.fire (zk.wpd:15641:9)
    at _fire (zk.wpd:15798:13)
    at Object.fireDown (zk.wpd:16031:7)
    at Object.fireDown (zk.wpd:17966:28)
    at Object.fireShown (zk.wpd:18870:14)
    at opts.afterAnima (zk.wpd:16484:16)

<zk xmlns:w="client" xmlns:ca="client/attribute">
	
 	<script><![CDATA[
	zk.afterLoad("zul.tab", function () {
	    var _xTab = {};
	    zk.override(zul.tab.Tab.prototype, _xTab, {
	        _sel: function _sel(toSel, notify) {
	    	      var tabbox = this.getTabbox();
	    	      /* ZK-1441
	    	       * If tabbox is animating (end-user click different tabs quickly), ignore this action.
	    	       */

	    	      if (!tabbox || tabbox._animating) return;
	    	      var panel = this.getLinkedPanel(),
	    	          inAccordion = tabbox.inAccordionMold();

	    	      if (toSel) {
	    	        var ps;

	    	        if (ps = tabbox.tabpanels) {
	    	          if (ps._selPnl && ps._selPnl != panel) ps._selPnl._sel(false, inAccordion && !panel.skipAnimation);
	    	          ps._selPnl = panel; //stored in tabpanels
	    	        }

	    	        tabbox._selTab = this;
	    	      }

	    	      if (!this.desktop) return;
	    	      if (toSel) jq(this).addClass(this.$s('selected'));else jq(this).removeClass(this.$s('selected'));
	    	      if (panel && panel.isVisible()){	    	    	  
	    	        panel._sel(toSel, !panel.skipAnimation);
	    	      }

	    	      if (!inAccordion) {
	    	        var tabs = this.parent;
	    	        if (tabs) tabs._fixWidth(toSel); //ZK-2810: don't set height to tabbox when deselect
	    	      }

	    	      if (toSel) {
	    	        if (tabbox.isVertical()) tabs._scrollcheck('vsel', this);else if (!tabbox.inAccordionMold()) tabs._scrollcheck('sel', this);
	    	      }

	    	      if (notify) this.fire('onSelect', {
	    	        items: [this],
	    	        reference: this.uuid
	    	      });
	    	    }
	     });
	});
]]></script>

 ...
            <tabpanel w:skipAnimation="true">
                <ckeditor id="ck1" height="100%" width="100%" />
            </tabpanel>