Information Enterprise Server: Error

Template-Stack:
   ies-generator:/templates/generate.spml (1ms)

Tag:
   <sp:include module="${templateRef.module}" uri="${templateRef.uri}">

Message:
   Error in SPML: zwsk-module:/aggregator/main.spml
   
   java.lang.NullPointerException
       com.sitepark.ies.taglib.core.IncludeTag.doEndSpmlTag(IncludeTag.java:316)
       com.sitepark.ies.taglib.core.SpmlTagSupport.doEndTag(SpmlTagSupport.java:620)
       org.apache.jsp.templates.generate_spml._jspx_meth_sp_005finclude_005f0(generate_spml.java:91)
       ...