<?xml version="1.0" encoding="UTF-8"?>
<zk>
    <language-config>
        <addon-uri>/metainfo/lang-addon-bind.xml</addon-uri>
    </language-config>
    
    
    <listener>
        <listener-class>org.zkoss.bind.tracker.impl.BindUiLifeCycle</listener-class>
    </listener>
</zk>
<?xml version="1.0" encoding="UTF-8"?>
<zk>
    <language-config>
        <addon-uri>/metainfo/lang-addon-bind.xml</addon-uri>
    </language-config>
    
    
    <listener>
        <listener-class>org.zkoss.bind.tracker.impl.BindUiLifeCycle</listener-class>
    </listener>
    
    <system-config>
        <disable-zscript>true</disable-zscript>
        <ui-factory-class>org.zkoss.zk.ui.http.SerializableUiFactory</ui-factory-class>
    </system-config>
</zk>
Disable zscript and define SerializableUiFactory
Disable zscript and define SerializableUiFactory