When I approach the githyanki in act 1 as my character with La'zel, when we get to the point where I tell her to play along, the game does not progress. It never brings up the roll screen as it needs to, and thus never progresses past that point.
If you have mods installed, deinstall ModFixer and Improved UI and erase the files. Those were the culprits for me. Both have information/ new files up, how to proceed with patch 2.
"We are all stories in the end. Just make it a good one."