Security checkpoint not connected

[Camp]

Hi,
I can see I ain't the first one with this problem.
I'm doing the tutorial atm. Following step by step.
But I keep getting the same error, trying to open up for commercial airlines.

On the stand it says "Security checkpoint not connected"...

It is connected - I build the foundation. Then I build a wall straight through it all. Opened up only for the security checkpoint, exit etc.
And marked the zone as secured. But still nothing.

Any idea on what I'm doing wrong?

Picture of the airport:

https://i.imgur.com/eP8hGKj.jpeg

[andycishere]

Hi

The stands itself already have a road included with crosswalk. You added two additional lanes between them and the terminal. Those have no crosswalk, so now there is no connection to the terminal.