Like the title says, in 1.4.0 I'm unable to link dispatchers to anything as the linking tool doesn't do anything upon crouch right clicking a dispatcher or an inventory.

that's weird.
do you have the latest limelib version?
does it work with only transprot installed?
does the log have any errors?

do you play in multiplayer?

I figured out where the problem is. But I currently don't know why it happens.