[edit: confirmed I was able to open the other door. I would say it's a bit unintuitive though - if the doors are one-sided, good level design would say make sure it's more obvious or the player can only get to it from one side?]
I have an idle duplicant next to one of those alien doors. If I click on submit bioscan, nothing happens.
I tried clicking the button several times while all my dupes were pathing around this area, none of them went to open the door.
I tried setting priority to 5*
Nothing I do will make my dupes open the door.
Pathing to the door is unobstructed - I am able to command Ellie to stand by the door, she just won't open it.
Find an alien door, click submit bioscan