I have a main ZUL file (in this example index.zul) that includes other ZUL files via apply element. The templateURL is dynamically and loaded via MVVM

<apply templateURI="@init(mainVM.headerLayout)" vmClass="@init(mainVM.headerVmClass)"/>

With ZK 8.6.2 I get org.zkoss.zk.ui.UiException in included ZUL file (in this example header.zul)

When I change the templateURI to static value, it works with ZK 8.6.2

<apply templateURI="/header.zul" vmClass="@init(mainVM.headerVmClass)"/>

Steps to Reproduce

zk862.zip

Start enclose example with ZK 8.6.2 http://<server>:<port>/zk862/index.zul

Change in pom.xml the ZK version to 8.6.1 and repeat step one, now it works.

Workaround

 flip the order of properties then vmClass is loaded before evaluating the templateURI

<apply vmClass="@init(mainVM.headerVmClass)" templateURI="@init(mainVM.headerLayout)" />