it seems the RTL support missing am try the RTL from the 3.6v but this.tpl is not defined
this.tpl.className = “dhtmlxLayoutPolyContainer_”+this.skin+(this._r?" dhxlayout…
Hello
Sorry, at present moment we don’t provide RTL support for 4+ versions. You can contact sales@dhtmlx.com or open ticket in support system to ask for customization, we will try to help you integrate rtl pack from 3.6 version