The WEB attendant console user is only needed for the Attendant Console but, you must create a user with id 'ac' from the CCM user administration page. Enable CTI use for this user and use 12345 as password. After this you must associate the pilot point to this user. Also check that the TCD service is running.
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.