Stuck Mid Way Thru A Quest, Not That Im Physically Stuck. Can I Restart A Quest?

i died in a quest called Rise of the Quartron where you get teleported to a "laboratory" and a bunch of enemies spawn WHILE the characters keep on talking and i was focused on reading the chat messages, then i got killed by a bunch of enemies that spawn. Yes i am not a native English speaker so i read quite a bit slower than others. now basically i cant get back into the "laboratory" since you have to be teleported there i reckon, and it seems like i cant get back there even after walking the EXACT same way i did before entering the "laboratory". Now, a quest restart would really help.

 

Quests can't restart. If you mean the laboratory where you overload the door and blow it up, then do that again, and walk into the black blocks.