✓ Pro Bedwars [Solo, Teams, Holograms, Leaderboards, Generators, Upgrades] v12.8

Update pls

Why i can't install plugin? ;(

Error occurred while enabling ProBedwars v1.0 (Is it up to date?)
java.lang.NullPointerException: null
at io.gabbo200.github.Bedwars.Main.onDisable(Main.java:514) ~[?:?]
at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:266) ~[craftbukkit-1.12.jar:git-Bukkit-9a1fc1e]
at io.gabbo200.github.Bedwars.Main.u(Main.java:1588) ~[?:?]
at io.gabbo200.github.Bedwars.Main.onEnable(Main.java:172) ~[?:?]
at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:264) ~[craftbukkit-1.12.jar:git-Bukkit-9a1fc1e]
at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:329) [craftbukkit-1.12.jar:git-Bukkit-9a1fc1e]
at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:401) [craftbukkit-1.12.jar:git-Bukkit-9a1fc1e]
at org.bukkit.craftbukkit.v1_12_R1.CraftServer.enablePlugin(CraftServer.java:360) [craftbukkit-1.12.jar:git-Bukkit-9a1fc1e]
at org.bukkit.craftbukkit.v1_12_R1.CraftServer.enablePlugins(CraftServer.java:321) [craftbukkit-1.12.jar:git-Bukkit-9a1fc1e]
at net.minecraft.server.v1_12_R1.MinecraftServer.t(MinecraftServer.java:411) [craftbukkit-1.12.jar:git-Bukkit-9a1fc1e]
at net.minecraft.server.v1_12_R1.MinecraftServer.l(MinecraftServer.java:372) [craftbukkit-1.12.jar:git-Bukkit-9a1fc1e]
at net.minecraft.server.v1_12_R1.MinecraftServer.a(MinecraftServer.java:327) [craftbukkit-1.12.jar:git-Bukkit-9a1fc1e]
at net.minecraft.server.v1_12_R1.DedicatedServer.init(DedicatedServer.java:248) [craftbukkit-1.12.jar:git-Bukkit-9a1fc1e]
at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:521) [craftbukkit-1.12.jar:git-Bukkit-9a1fc1e]
at java.lang.Thread.run(Unknown Source) [?:1.8.0_201]