Thanks to everyone who continues stopping by our forums to report bugs, we've got a handful of fixes ready for you today!
There were some late-game conversations which were mishandling their logic, meaning that folks weren't seeing all of the options available (depending on how they played through the mid-game storylines). In some cases, this meant you couldn't see ANY conversation options, resulting in a softlock.
Those issues should now all be resolved; folks who were having problems progressing in the final stages of Sid's main storyline may want to go back and see if any conversations that seemed like dead ends previously have more options available, now.
Thanks again for letting us know about the problems you've encountered while playing Null State, and be sure to pop into the forums if you run across any other issues after this update!