Given the router needs the ability to point traffic for the subnet to the Service-Engine, configuring your loopback with /32 means that traffic for the greater 172.16.30.0/24 will not be passed to the Service-Engine1/0. No connectivity will be established to the CUE using this configuration.
If you must not change the loopback, you could directly configure the Service-Engine directly.
Are you getting this error “Installer User Interface Mode Not Supported. The installer cannot run in this UI mode. To specify the interface mode, use the -i command-line option, followed by the UI mode identifier. The value UI mode identifiers...
The below trick might come handy when you have to add a new node to a cluster but you don't have or is unsure of the security password for the publisher. This procedure has been around for ages.
1) Login into the CLI of the Publisher.