The plugin is receiving a big recoding the Spigot version will be released with the release of version 2.2, if you want to use the stable plugin use version 2.1.5

It also includes breaks as files, ids and more used to be called outposts and are now called outposts

• This update include some bug fix
• I have fixxed some incompatibilities if you don't have KingdomsX
• Added /outpost admin report to give more information if you are reporting a bug
• Added initial Waves editor (but its under construction wait next patch)