When a user opens a networked portal, it will open the iris of the exit gate.
If the user goes through that exit before they go through the entrance, it will result in an invalid destination error.

Is this intended behaviour?
Perhaps a more clear localization message may be in order.

Possibly related to #160

Sure! sounds like a plan

This is intended behavior, as the destination of the teleportation would otherwise be unclear for the end user if they went from the exit

Makes sense.
Think it is worth improving the error message?

We could probably add another message, if that improves something

How about tpOccupied "Another player is currently using this portal; try again in a few moments!"?