Check your network connection and try again.
You can also check the following if you did a mass deployment with Identifier:
Make sure that the Identifier is correct.
The Identifier should include == and should not have any line breaks.
(For Mac Security Agent deployment) When running the deployment script, make sure that Identifier.plist and WFBS-SVC_Agent_Installer.pkg are inside the /var/tmp/TrendMicro folder to confirm that they were copied successfully.