You are installing the Data Loss Prevention (DLP) Enforce Server from the EnforceServer.msi using the wizard and have entered all the required fields.
The progress bar begins but throws an error on reaching the 'Setting Administrator Password' stage.
CustomActionData is in incorrect user type
The DLP installer will fail if the service account used, or the administrator password provided has certain special characters. For sure the character ";" when used with either the service account or the administrator account will cause the installer to fail with this error. The password can be changed post installation.
Rerun the installation and remove special characters to complete the installation. The password(s) can be changed to meet your requirements after the installation completes.