I have been told that, when you get naval blockaded, your opponent needs to have at least one ship to keep the blockade up. As you can see in the pictures, my opponent has naval blockade me, but the nation has no ships!
Is this a bug?
Proof i am naval blockade and can no longer trade:
http://imgur.com/2HVmAEn http://imgur.com/UmpHQit
Proof of my opponent having no ships: http://imgur.com/yK5qBWa
My nation link: https://politicsandwar.com/nation/id=21488
Opponents nation link: https://politicsandwar.com/nation/id=22642