Please follow the below mentioned steps:
/etc/vmware/vcf/commonsvcs/known_hosts,/home/vcf/.ssh/known_hosts ). If not, please refer to Broadcom article How to update the SSH host keys on the SDDC Manager to add the keys using the fixHostkeys.py script.curl -X POST -H "Content-Type: application/json" -d '{"fipsMode":false,"certificateValidationEnabled":true}' http://localhost/appliancemanager/securitySettings