Followed these instructions from the nutanix_monitor probe FAQ section:
How do I resolve a SSL handshake exception/ handshake failure error when I try to connect to the Prism API after upgrading my Nutanix Prism environment to 18.104.22.168?
If an SSL certificate or chain installed in your cluster includes an EC DSA (ecdsa) key type and you have enabled client authentication, you might get a handshake_failure error message when you try to connect to the Prism environment by using nCLI (Nutanix command line) from your client device. We recommend you to install Java Server JRE on your client device and start a new nCLI session.
Installed a Java JRE downloaded from the web to the robot where the probe is deployed, set the JAVA_HOME system environment variable to point to this JRE, and rebooted the robot, but continue to get the SSL handshake failure message when trying to connect to a PRISM API that uses SSL certificates.
Deploy the 1.80 UIM java_jre package to the robot where the nutanix_monitor probe is deployed, then restart the robot.
Request entered to clarify the instructions in the FAQ provided on the nutanix_monitor AC Configuration Wiki page.