There's a litte problem with the /portal portal command.
If I type it, the chat says "You have been given a Portal Block!" but I don't get one :/.
There's no error in the console and I'm using the latest version of spigot.

It is a problem only in 1.8. It is physically impossible to get the portal block as an item in your hand now or at least the old way doesn't work. I will replace it with purple panes or purple woll with a special name which when placed will be automatically be replaced with portal blocks.

Really needs to get done. Will be one of the next important features to add.

Finally updated, will be released later