NW 18.1 and NMM181 Exchange error "Unable to initialize Powershell and/or Active Directory interfaces"

HI all, I'm doing a client installation on an Exchange Server 2016 using Networker 18.1 and the Networker Module for Microsoft 18.1. When I try to launch the Configure Exchange Admin User, and click on the Update Admin "Unable to initialize Powershell and/or Active Directory interfaces" I first thought is to run the regasm "C:\Program Files\EMC NetWorker\nsr\bin\libnmexchmgmt.dll" But there is no libnmexchmgmt.dll in the above folder. May I know if I made some mistake during the installation that could cause the error above? I'm using a local super user (Maybe I should have asked for Domain User ?)