windows server 2016 not able to connect to nx cloud

Hi, appreciate your help to solve this problem
Thank you

NX server using windows server 2016 not able to connect to nx cloud

Steps to replicate problem

using the PC where nx server is installed, open admin page from web browser
click "connect to nx cloud" button
successfully logged in to nx cloud when the pop-up browser asks to login to nx cloud
STUCK in the local admin page where there is a pop-up asking to input the local admin password (password entered is already correct).
System accepts admin password as correct, but after loading and waiting for a few minutes, system is still stuck at the same input field and nothing happens (see file attached)

Alternative steps to replicate problem:

using a different PC (not nx server) to connect as nx client
go system administration -> nx cloud
click "connect system to nx cloud"
error msg appears "Failed to connect system to Nx Cloud. None of your Servers has connection to Cloud"