2647043 - Cannot process an HTTP request to servlet [default] in [com.sap.portal.design.urdesigndata] Errors in traces

• Checking the NetWeaver Java Developer/Default Trace files the following error (or similar) is written constantly:
  "Cannot process an HTTP request to servlet [default] in [com.sap.portal.design.urdesigndata] web application.
  [EXCEPTION]
  java.lang.NullPointerException: while trying to invoke the method java.lang.String.substring(int) of a null object loaded from local variable 'targetURL'
  at com.sap.design.ur.UrDesignDataFilter.getTargetApplication(UrDesignDataFilter.java:165)
  at com.sap.design.ur.UrDesignDataFilter.doFilter(UrDesignDataFilter.java:72)
  at com.sap.engine.services.servlets_jsp.server.runtime.FilterChainImpl.doFilter(FilterChainImpl.java:79)
  at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.runServlet(HttpHandlerImpl.java:441)
  at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.handleRequest(HttpHandlerImpl.java:210)"
• No Portal functionality impact is observed
• It is not clear how to reproduce the error

• SAP Netweaver 7.31 and higher releases
• Enterprise Portal

Enterprise Portal 7.50, EP 7.5,Theme,Cannot process an HTTP request to servlet [default] in [com.sap.portal.design.urdesigndata],java.lang.NullPointerException,com.sap.portal.design.urdesigndata , KBA , EP-PIN-TOL , Themes / Portal UI Theme Designer / Theme Editor , BC-WD-UR , Unified Rendering , EP-PIN-AI , Application Integration , EP-PIN-NAV , Navigation , EP-PIN-PRT , Portal Runtime , Problem