6027-3549 [E] Key '`keyID`:`rkmID`' could not be fetched. The TCP connection with the RKM could not be established.

Explanation
Unable to establish a TCP connection with the key
server.
User response
Check the connectivity to the key server.

6027-3549 [E] Key 'keyID:rkmID' could not be fetched. The TCP connection with the RKM could not be established.