Issue
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