AAC Error

[01:42:41 ERROR]: Error occurred while enabling AAC5 v5.1.0 (Is it up to date?)
java.lang.AbstractMethodError
        at me.konsolas.aac.hx.a(Unknown Source) ~[?:?]
        at me.konsolas.aac.aU.a(aU.java:5) ~[?:?]
        at me.konsolas.aac.hx.a(Unknown Source) ~[?:?]
        at me.konsolas.aac.I.a(I.java:152) ~[?:?]
        at me.konsolas.aac.hx.a(Unknown Source) ~[?:?]
        at me.konsolas.aac.I.<init>(I.java:126) ~[?:?]
        at me.konsolas.aac.I.a(I.java:54) ~[?:?]
        at me.konsolas.aac.hx.a(Unknown Source) ~[?:?]
        at me.konsolas.aac.AAC.onEnable(AAC.java:1) ~[?:?]
        at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:321) ~[patched.jar:git-PaperSpigot-"4c7641d"]
        at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:332) [patched.jar:git-PaperSpigot-"4c7641d"]
        at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:407) [patched.jar:git-PaperSpigot-"4c7641d"]
        at org.bukkit.craftbukkit.v1_8_R3.CraftServer.loadPlugin(CraftServer.java:359) [patched.jar:git-PaperSpigot-"4c7641d"]
        at org.bukkit.craftbukkit.v1_8_R3.CraftServer.enablePlugins(CraftServer.java:318) [patched.jar:git-PaperSpigot-"4c7641d"]
        at net.minecraft.server.v1_8_R3.DedicatedServer.init(DedicatedServer.java:203) [patched.jar:git-PaperSpigot-"4c7641d"]
        at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:563) [patched.jar:git-PaperSpigot-"4c7641d"]
        at java.lang.Thread.run(Thread.java:748) [?:1.8.0_282]
[01:42:41 INFO]: [AAC5] Disabling AAC5 v5.1.0