:ERROR MESSAGE:
org.ofbiz.widget.screen.ScreenRenderException: Error rendering screen [component://mikrotron/widget/CatalogScreens.xml#product]: java.lang.IllegalArgumentException: Error running script at location [component://order/webapp/ordermgr/WEB-INF/actions/entry/catalog/Product.groovy]: java.util.ConcurrentModificationException (Error running script at location [component://order/webapp/ordermgr/WEB-INF/actions/entry/catalog/Product.groovy]: java.util.ConcurrentModificationException)