2773105 - No System Landscape Registered error when accessing Message Monitoring on Runtime Workbench (RWB)

• When trying to access message monitoring on RWB (Runtime Workbench) you get the error No system landscape Registered. 
   
• If you go to SLD -> Technical Systems and filter for Process Integration, the Technical System for RWB is missing;
• After restarting the application com.sap.xi.rwb in Start & Stop, there will be exceptions like the ones below in the default traces:
• Invalid entry in configuration: section nameserver, key address;
• No central monitor defined in RWB;
• Wrong usage type AEX is configured in com.sap.aii.ibrep.core.usage_type property  from XPI Service: AII Config Service;
• No central monitoring server in exchange profile;
• HTTP response code: 503 (Service Unavailable);
• User credentials are invalid or user is denied access;
• ABAP system for JCo connection is not defined (null);
• TREX Name Server is not configured.

• SAP NetWeaver
• SAP Process Integration

configuration wizard; configuration; wizard; com.sap.aii.rwb.serviceuser.pwd; rwb; serviceuser; service user; PIRWB , KBA , BC-XI-CON-AFW , J2EE Adapter Framework , BC-NWA-XPI , Process Integration (PI) Monitoring , BC-XI-IS-WKB , Runtime Workbench / Monitoring , Problem