3470081 - irj/portal throwing 500 internal server error after SP update

• 500 internal server error when accessing the portal tabs after SP update.
• From Default trace below exception can be seen:
  
  Cannot process an HTTP request to servlet [gateway] in [irj] web application.
  [EXCEPTION]
  java.lang.NoSuchMethodError: com.sapportals.portal.dsm.IDsmService.servletIncludeSupport()Z

#2.0#2024 04 17 02:40:38:832#+0530#Error#com.sap.engine.services.servlets_jsp.ISE500#
com.sap.ASJ.web.000500#EP-PIN-PRT#sap.com/irj#C0000A6E429E004800000003000054DB#3525050000000004#sap.com/irj#com.sap.engine.services.servlets_jsp.ISE500#Guest#0#A8231C59FC3411EE821C00000035C9BA#a8231c59fc3411ee821c00000035c9ba#0#Thread[HTTP Worker [@1457873977],5,Dedicated_Application_Thread]#Plain#
500 Internal Server Error is returned for HTTP request [https://pace.apollotyres.com:50000/irj/servlet/prt/portal/prtroot/com.sap.portal.navigation.portallauncher.default]:
  component [gateway],
  web module [irj],
  application [sap.com/irj],
  DC name [sap.com/irj],
  CSN component[EP-PIN-PRT],
  problem categorization [com.sap.ASJ.web.000137],
  internal categorization [-1700052125].

•  Issue will be resolved after restarting the server.

• SAP NetWeaver 7.5
• SAP NetWeaver Portal 7.5

500 internal server error, After SP upgrade, After restarting, Irj/portal, initial patch , KBA , EP-PIN-PRT , Portal Runtime , Problem