Plugin Help Every command broken

gmc
[14:07:03 WARN]: Unexpected exception while parsing console command "gmc" org.bukkit.command.CommandException: Unhandled exception executing 'gmc' in org.bukkit.command.PluginCommand(gamemode, Essentials vTeamCity) at me.incomprehendable.dev.pwp.FakeSimpleCommandMap.dispatch(FakeSimpleCommandMap.java:102) ~[?:?] at org.bukkit.craftbukkit.v1_12_R1.CraftServer.dispatchCommand(CraftServer.java:628) ~[craftbukkit-1.12.2.jar:git-Bukkit-fb414fe] at org.bukkit.craftbukkit.v1_12_R1.CraftServer.dispatchServerCommand(CraftServer.java:614) [craftbukkit-1.12.2.jar:git-Bukkit-fb414fe] at net.minecraft.server.v1_12_R1.DedicatedServer.aP(DedicatedServer.java:408) [craftbukkit-1.12.2.jar:git-Bukkit-fb414fe] at net.minecraft.server.v1_12_R1.DedicatedServer.D(DedicatedServer.java:372) [craftbukkit-1.12.2.jar:git-Bukkit-fb414fe] at net.minecraft.server.v1_12_R1.MinecraftServer.C(MinecraftServer.java:651) [craftbukkit-1.12.2.jar:git-Bukkit-fb414fe] at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:555) [craftbukkit-1.12.2.jar:git-Bukkit-fb414fe] at java.lang.Thread.run(Thread.java:745) [?:1.8.0_112] Caused by: java.lang.NoClassDefFoundError: org/bukkit/util/Java15Compat at me.incomprehendable.dev.pwp.FakeSimpleCommandMap.dispatch(FakeSimpleCommandMap.java:98) ~[?:?] ... 7 more Caused by: java.lang.ClassNotFoundException: org.bukkit.util.Java15Compat at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:81) ~[craftbukkit-1.12.2.jar:git-Bukkit-fb414fe] at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:76) ~[craftbukkit-1.12.2.jar:git-Bukkit-fb414fe] at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.8.0_112] at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_112] at me.incomprehendable.dev.pwp.FakeSimpleCommandMap.dispatch(FakeSimpleCommandMap.java:98) ~[?:?] ... 7 more

Thats the console messages but no command work. Please help

 

Essentials 2.x
Perworldplugins 1.8. Which I removed as it's not 1.12
(Is there a 1.12.2 perworldplugins?)

 

I have no idea. That's why i am posting it here.