You may encounter the PKIX error when clicking "Test Connection":
The reason for this error message is that the certificate of the domain cdn.redhat.com is self-signed and untrusted. To overcome this, the certificate needs to be trusted by Java/Artifactory, and can be resolved by executing the below command to get the certificate, and then following our documentation on Trust a self-signed certificate or a new CA or our Knowledge Base to add it to Artifactory.
openssl s_client -showcerts -connect cdn.redhat.com:443