ALL oak planks are now barrels on the server... so entire houses... anything made of oak planks as of version 2.0. Unplayable with this bug. Opens as a 9 slot barrel. Small barrels also no longer work by clicking their signs... although clicking oak plank steps will open a 9 slot barrel.

Thank you for your Bug report! I have found and fixed the issue and will update the Plugin shortly.

You can update to the v2.0.1 and it should now work fine!
It was a problem with converting Barrels that were located in large coordinates.