What cannot be a reason for "Failed to get remote orchestrator interfaces" error message, when clicking on "Orchestrator" in WebUI?

What cannot be a reason for "Failed to get remote orchestrator interfaces" error message, when clicking on "Orchestrator" in WebUI?
A . Remote orchestrator has no empty interfaces
B . One orchestrator only, but Orchestrator amount is 2 or no Sync in between orchestrators
C . No Sync between orchestrators
D . D.Single orchestrator environment, but configured Orchestrator amount is 2

View Answer

Answer: A