What to do? (Fallout 4)

Try to register resurrect in the console on the dude (I don't remember his name), who commands the robot. It helped me. This kind of reboots him and he instructs the robot to further explode.

reboot and start somewhere from the beginning of the mission

mr.oddy
Let's try

Tefarteds
I had exactly the same garbage. I ran, I ran around. Then he ran away, approached the wall and let E press in a frantic order and I saw the dude ran to give the robot an assignment - so everything was decided)))

I had exactly the same garbage, the wiki says that Mel needs to talk (like there should be additional dialogue) and Sonya should blow up the wall after that, it didn't help me personally, I had to replay from an early save and just blow up this wall first , and the quest went fine, but during the first playthrough I didn't notice this wall and didn't blow it up right away, and Sonya started up after that.
Cool quest by the way.

If this is the last wall then talk to the man.