Replication failure - HTTP error 60

On the primary root server, I am getting this error message when trying to replicate from the DSA secondary:

HTTP error 60: SSL peer certificate or SSH remote key was not OK: SSL certificate problem: unable to get local issuer certificate

Because the DSA DB had grown to 2x the size of the primary db, I performed a complete app and DB reinstall of the DSA server and then this issue happened. Support says that the only fix they suggest is to do another DSA app server uninstall.

Does anyone have any other suggests that doesn’t involve a root server app reinstall?