Unable to start MID WebService Event Listener Context


Description

Access MID WebService Event Listener Context 
https://<INSTANCE_NAME>.service-now.com/nav_to.do?uri=ecc_agent_ext_context_event.do?sys_id=xxxxxxxxxx

Error message:

-> Could not start MID WebService Event Collectors extension because the MID Web Server extension is not running. 


Cause

No "Capabilities" for mid server

Resolution

1) Add 'ALL' capabilities to mid server
2) restart mid server