The Enemy You Know Campaign Quest, unable to pick up again

The Enemy You Know
Got to the 3rd part where the guy picks you up and my game immediately crashed. Logged back in and was unable to interact with him again. Dropped the quest and now although the campaign quest marker is on my map and icon above Eridia’s head, when I right click Eridia nothing happens, no quest dialogue is displayed.

Also I keep getting silenced randomly every few minutes for 5 seconds…

Any ideas what to try?