Task to register Service Node in Parallels Plesk Automation Management Node (PPA MN) failed with the error:
Failed to execute command 'cscript /Nologo http\_download.js http://MN_IP_ADDRESS/tarballs/Win32Bin/support.cab'. Check 'c:\\POA\_Deploy' at host 'ServiceNode_IP_ADDRESS' for more details.
where MN_IP_ADDRESS is IP Address of the Management Node.
Some packages are downloaded from the PPA MN during Service Node registration. Connection to port 80 from Service Node to PPA MN is closed.
Port 80 should be opened on the PPA MN. Make sure that port 80 is not blocked by firewall.