Having an error

[LeeHeoJae]

There is an error which occurs enabling and disabling.
My Nukkit version is 1.0.0 #499

Enabling's error
[ALERT] java.lang.RuntimeException: unacceptable character ' ' (0x0) special characters are not allowed
in "'string'", position 0
at cn.nukkit.plugin.PluginManager.enablePlugin(PluginManager.java:439)
at cn.nukkit.Server.enablePlugin(Server.java:675)
at cn.nukkit.Server.enablePlugins(Server.java:664)
at cn.nukkit.Server.(Server.java:506)
at cn.nukkit.Nukkit.main(Nukkit.java:109)
Caused by: unacceptable character ' ' (0x0) special characters are not allowed
in "'string'", position 0
at org.yaml.snakeyaml.reader.StreamReader.checkPrintable(StreamReader.java:67)
at org.yaml.snakeyaml.reader.StreamReader.(StreamReader.java:47)
at org.yaml.snakeyaml.Yaml.loadAs(Yaml.java:427)
at cn.nukkit.utils.Config.parseContent(Config.java:551)
at cn.nukkit.utils.Config.load(Config.java:160)
at cn.nukkit.utils.Config.(Config.java:98)
at cn.nukkit.utils.Config.(Config.java:107)
at me.onebone.economyapi.provider.YamlProvider.init(YamlProvider.java:33)
at me.onebone.economyapi.EconomyAPI.selectProvider(EconomyAPI.java:324)
at me.onebone.economyapi.EconomyAPI.initialize(EconomyAPI.java:301)
at me.onebone.economyapi.EconomyAPI.onEnable(EconomyAPI.java:281)
at cn.nukkit.plugin.PluginBase.setEnabled(PluginBase.java:89)
at cn.nukkit.plugin.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:117)
at cn.nukkit.plugin.PluginManager.enablePlugin(PluginManager.java:435)
... 4 more

Disabling's error
[ALERT] java.lang.NullPointerException
at me.onebone.economyapi.provider.YamlProvider.save(YamlProvider.java:61)
at me.onebone.economyapi.EconomyAPI.saveAll(EconomyAPI.java:268)
at me.onebone.economyapi.EconomyAPI.onDisable(EconomyAPI.java:295)
at cn.nukkit.plugin.PluginBase.setEnabled(PluginBase.java:91)
at cn.nukkit.plugin.JavaPluginLoader.disablePlugin(JavaPluginLoader.java:132)
at cn.nukkit.plugin.PluginManager.disablePlugin(PluginManager.java:509)
at cn.nukkit.plugin.PluginManager.enablePlugin(PluginManager.java:441)
at cn.nukkit.Server.enablePlugin(Server.java:675)
at cn.nukkit.Server.enablePlugins(Server.java:664)
at cn.nukkit.Server.(Server.java:506)
at cn.nukkit.Nukkit.main(Nukkit.java:109)