If you encounter a handshake error while trying to access a Nutanix monitor, follow these steps to troubleshoot and resolve the issue:

Ensure that all validations are performed from the machine where Applications Manager is installed.

Verify Port and Network connectivity

Confirm that the required port is open and the monitor is reachable via ping:

1. Open Command Prompt as Administrator on the Applications Manager installed machine.
   
2. Run the following commands (replace <IP_ADDRESS> and <PORT> with your actual Nutanix resource details): 

ping <IP_ADDRESS>  

telnet <IP_ADDRESS> <PORT>  

Check API Accessibility

1. Open a browser on the machine and try accessing the following API URL (replace <IP_ADDRESS> and <PORT> with Nutanix resource details):

https://<IP_ADDRESS>:<PORT>/PrismGateway/services/rest/v2.0/cluster/

1. Verify if the API responds with valid data. If the API does not load, coordinate with your Nutanix Server team to determine the cause.

Validate User Credentials

1. Ensure that the user credentials used to add the monitor have Prism Admin privileges. Without these privileges, Applications Manager cannot collect data.

Additional Notes:

1. All tests must be executed from the Applications Manager installed machine to ensure accurate validation.
   
2. If the browser or API access fails, consult your Nutanix Server team to resolve connectivity issues.