Latest Nukkit Throwing Error

[rackgaming]

Throwing java.lang.NullPointerException: Cannot invoke "Sergey_Dertan.SRegionProtector.Region.RegionManager.save(Sergey_Dertan.SRegionProtector.Main.SRegionProtectorMain$SaveType, String)" because "this.regionManager" is null at Sergey_Dertan.SRegionProtector.Main.SRegionProtectorMain.save(SRegionProtectorMain.java:239) ~[?:?] at Sergey_Dertan.SRegionProtector.Main.SRegionProtectorMain.save(SRegionProtectorMain.java:224) ~[?:?] at Sergey_Dertan.SRegionProtector.Main.SRegionProtectorMain.onDisable(SRegionProtectorMain.java:421) ~[?:?] at cn.nukkit.plugin.PluginBase.setEnabled(PluginBase.java:91) ~[server.jar:?] at cn.nukkit.plugin.JavaPluginLoader.disablePlugin(JavaPluginLoader.java:132) ~[server.jar:?] at cn.nukkit.plugin.PluginManager.disablePlugin(PluginManager.java:510) [server.jar:?] at cn.nukkit.plugin.PluginManager.enablePlugin(PluginManager.java:442) [server.jar:?] at cn.nukkit.Server.enablePlugin(Server.java:750) [server.jar:?] at cn.nukkit.Server.enablePlugins(Server.java:739) [server.jar:?] at cn.nukkit.Server.<init>(Server.java:507) [server.jar:?] at cn.nukkit.Nukkit.main(Nukkit.java:120) [server.jar:?]