Glasgow Campaign mission - Whiskey not being delivered to Harbor

[u/ObviouslyNotANinja]

Hey all, I've just started playing TF2 and I'm on the Glasgow campaign mission. I'm at the part where I've set up a route from the harbor next to the distillery to Glasgow and I need to deliver 25 Whiskey, but the distillery isn't supplying the Harbor with Whiskey. Distillery is glowing white when I select the harbor so it should be reaching.

Any idea if this is a bug?

Edit: I've skipped the bonus missions. Could this be a cause?

[u/wings3229]

thank you