I got this problem before. It was caused by the route-point DN already taken by other device. Befroe I assign a route-point DN, I searched in Device > Phone against Directory Number. I chose a number not in that list. The correct search place should be in Route Plan > Route Plan Report.
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.