2002334 - NoSuchMethodError:...KmConnection.handleRequestWithoutSettingEncoding

After system update or upgrade, KM icons are not displayed and Properties cannot be opened. 

Meanwhile, you notice the following error in the default trace:

#Error#com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl#com.sap.ASJ.web.000137#EP-PIN-PRT#sap.com/irj#sap.com/irj#com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl#Guest#0##10D3966CB02F11E3CE16000027B321EA#10d3966cb02f11e3ce16000027b321ea#10d3966cb02f11e3ce16000027b321ea#0#Thread[HTTP Worker [@1802736096],5,Dedicated_Application_Thread]#Plain##
Cannot process an HTTP request to servlet [prt] in [irj] web application.
[EXCEPTION]
java.lang.NoSuchMethodError: com.sapportals.wcm.portal.connection.KmConnection.handleRequestWithoutSettingEncoding(Lcom/sapportals/portal/prt/dispatcher/IDispatcherContext;)V
 at com.sapportals.wcm.portal.connection.KmConnection.handleRequest(KmConnection.java:50)
 at com.sap.portal.prt.dispatcher.DispatcherServlet.service(DispatcherServlet.java:132)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:847)
 ...

Or 500 Internal Server Error is returned for HTTP request [http://hostname:port/irj/go/km/details]:

component [prt],
web module [irj],
application [sap.com/irj],
DC name [sap.com/irj],
CSN component[EP-PIN-PRT],

[EXCEPTION]
java.lang.NoSuchMethodError: com.sapportals.wcm.portal.connection.KmConnection.handleRequestWithoutSettingEncoding(Lcom/sapportals/portal/prt/dispatcher/IDispatcherContext;)V

• SAP Netweaver 7.3X
• SAP Netweaver 7.4

java.lang.NoSuchMethodError, handleRequestWithoutSettingEncoding, repsitory, repositories, icon, picture, context menu, KM, Details, popup, 500 Internal Server Error, Enterprise Portal 7.30, EP 7.30, Enterprise Portal 7.31, EP 7.31, Enterprise Portal 7.40, EP 7.4 , KBA , EP-KM-CM , Content Management , EP-PIN-PRT , Portal Runtime , Problem