After defeating the dominion troops and being assigned the quest "The Last Endeavor" by Ellaria Anfarel, I am told to speak with Renno Highwater, the merchant who was in the rebel village in the buried city of Dinas Gessa. After the fight, Renno is relocated to the "Crossroads" marker on the map.
I am unable to speak with Renno. I can only initiate trade with him. This has left me seemingly unable to continue along the Rebel quest chain.
I am on the current beta branch (Version 1.3.48 - Public), as I needed to switch to said beta branch in order to get the quest "Ugly Truth" to complete properly (giants turned hostile to me upon entering their camp).
Remember: Imagination defines the limits of our realities!