Two domibus isntances (red/blue) can't communicate after deployment to AWS infra

We created AWS infra to host Domibus. For testing purposes, we established second domibus service (to simulate final endpoint).

First domibus received the message from SQS queue but can't pass it through to Domibus red instance.

We found following error in the logs:

EBMS_0005 - Error dispatching message to http://domibusi2.inig.local:8080/domibus/services/msh

I'm assuming it's sth wrong with the url. Can any one assist and point where should we go next with debug process?