Plan B glitch?

[Saph]

So I've gotten to Sanctuary and installed the core, my objective says to meet the guard at the gate but when I talk to him he just spouts generic dialogue and doesn't do anything.

Is there some kind of workaround for this or do I need to start the game all over again?

[Vincent]

Walk back a few steps and he will walk to the switch.

[Rated A for Anarchy]

Walk a bit away don't talk to him on repeat and the door should open

[Saph]

Alright, cheers lads he moved after I jumped on his head 5 times and then gave up and walked away.