2732132 - WDA: Cannot be processed in plugin mode http

When executing a Web Dynpro ABAP application, "500 Internal Server Error" is shown in the browser.
In transaction ST11 in the dev_icf trace one of the following error messages can be found:

• message E webdynpro_RT 023 cannot be processed in plugin mode
• message E webdynpro_RT 031 cannot be processed in plugin mode

If RZ11 parameter is/HTTP/show_detailed_errors is set to true according to SAP Help Page Managing Error Information, the screen below is shown:

• Web Dynpro ABAP
• SAP NetWeaver
• SAP NetWeaver Application Server for SAP S/4HANA
• ABAP PLATFORM - Application Server ABAP 

Web Dynpro, Webdynpro, Web Dynpro ABAP, WDA, WDA_GDPR, inactive SICF service, not activated, service node, se91, message short text, 500 internal server error, Message E WEBDYNPRO_RT 023 kann im Pluginmodus HTTP nicht verarbeitet werden, ERROR_MESSAGE_STATE, STARTUP_CHECKS, CL_WDR_CLIENT_ABSTRACT_HTTP===CP, IF_HTTP_EXTENSION~HANDLE_REQUEST, HTTP_START, ICF service node "&" is not active (see SAP Note 517484), RT 031, E webdynpro_RT 023, E webdynpro_RT 031 , KBA , BC-WD-ABA , Web Dynpro ABAP , BC-WD-ABA-REN , Rendering , BC-WD-ABA-RUN , Web Dynpro ABAP Runtime , BC-WD-ABA-CFG , Configuration / Personalization , BC-WD-ABA-GEN , Generation , Problem