Failed to Calculate Biome Rarity

[Former user]

Any time I edit the settings.json file, the plugin throws a fatal error on start and I get this crash report: http://pastebin.com/tcSaK7Np

world-settings.json: http://pastebin.com/c789AT7Z

If I use the default settings, there's no problem and it loads just fine.

[minelazz]

You can not set a property to 0. You need to disable it.

//Desert; "enabled": false, "percentage": 0.0