K Chen,
There are a few issues that could be causing no dagent connectivity. When you say you installed the trial to your PC... Ghost Solution Suite is supported on Windows 10 enterprise x64, Server 2008 R2, Server 2012 R2. Documentation here https://support.symantec.com/en_US/article.HOWTO111528.html. If you have Ghost Solution Suite installed on an unsupported environment, this could be causing your issue as well.
1. Dagent Connectivity Issues - Encrypted Sessions
https://support.symantec.com/en_US/article.TECH234...
2. Incorrect I.P address entered when doing remote install - On your client machine, open the dagent configuration by navigating to start and typing dagent configuration. Verify the I.P address is correct and that the service is started.
3. Firewalls - Ghost Solution Suite uses tcp port 402 for client connectivity back to the console. This port will need to be unrestricted on the server, client and any switches/firewalls that may be in between them.