Integrating hybris Commerce Accelerator with the OnPremise OMS fail to show Delivery Option at checkout process

I am trying to follow the instruction in here

however, I got stuck somewhere, I can't include below extensions

  <extension name="omsorders" />
  <extension name="omssampledata" />

if I do so, my checkout process-Delivery Option will not show any address (by default, it should offer two options).

there is no error be thrown in console, we are using integrated cybersource payment integration. but it haven't reached so far, basically stop at step 2, delivery option.

does any one know the reason behind it ?