What can be the reason for this error?

The logs in a FSSO collector agent (CA) are showing the following error:

failed to connect to registry: PIKA1026 (192.168.12.232)

What can be the reason for this error?
A . The CA cannot resolve the name of the workstation.
B . The FortiGate cannot resolve the name of the workstation.
C . The remote registry service is not running in the workstation 192.168.12.232.
D . The CA cannot reach the FortiGate with the IP address192.168.12.232.

Answer: C

Explanation:

https://kb.fortinet.com/kb/documentLink.do?externalID=FD30548