When uploading a certificate, the following error is seen in the Control Panel:
Key/Certificate Combination Validation Failed
Release : 2018.1
The first thing to try is to reboot the appliance and try again.
If that does not resolve the issue, then it is possible to manually install the certificates with the following steps
1. Using scp, upload the cert files to the /tmp directory on the server
2. Rename the files to server.crt, server.key (and serverbundle.crt if applicable)
3. Then to actually install the certs run one of the following commands:
# /usr/local/bin/installSSL.sh plain
# /usr/local/bin/installSSL.sh chained
This will install the new certificates and restart the HTTP process