>.... [13:55:15 ERROR]: Unhandled exception executing command 'list' in plugin MysticCore v1.6
org.bukkit.command.CommandException: Unhandled exception executing command 'list' in plugin MysticCore v1.6
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:47) ~[server.jar:git-Craftimize-"0971e3f"]
at com.earth2me.essentials.Essentials.onCommandEssentials(Essentials.java:481) ~[?:?]
at com.earth2me.essentials.Essentials.onCommand(Essentials.java:470) ~[?:?]
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:45) ~[server.jar:git-Craftimize-"0971e3f"]
at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:159) ~[server.jar:git-Craftimize-"0971e3f"]
at org.bukkit.craftbukkit.v1_15_R1.CraftServer.dispatchCommand(CraftServer.java:742) ~[server.jar:git-Craftimize-"0971e3f"]
at org.bukkit.craftbukkit.v1_15_R1.CraftServer.dispatchServerCommand(CraftServer.java:704) ~[server.jar:git-Craftimize-"0971e3f"]
at net.minecraft.server.v1_15_R1.DedicatedServer.handleCommandQueue(DedicatedServer.java:467) ~[server.jar:git-Craftimize-"0971e3f"]
at net.minecraft.server.v1_15_R1.DedicatedServer.b(DedicatedServer.java:430) ~[server.jar:git-Craftimize-"0971e3f"]
at net.minecraft.server.v1_15_R1.MinecraftServer.a(MinecraftServer.java:1131) ~[server.jar:git-Craftimize-"0971e3f"]
at net.minecraft.server.v1_15_R1.MinecraftServer.run(MinecraftServer.java:957) ~[server.jar:git-Craftimize-"0971e3f"]
at java.lang.Thread.run(Thread.java:834) [?:?]
Caused by: java.lang.NoClassDefFoundError: de/myzelyam/api/vanish/VanishAPI
at me.samgameryt.mysticcore.commands.WhoCommand.onCommand(WhoCommand.java:16) ~[?:?]
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:45) ~[server.jar:git-Craftimize-"0971e3f"]
... 11 more
Caused by: java.lang.ClassNotFoundException: de.myzelyam.api.vanish.VanishAPI
at java.net.URLClassLoader.findClass(URLClassLoader.java:471) ~[?:?]
at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:171) ~[server.jar:git-Craftimize-"0971e3f"]
at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:100) ~[server.jar:git-Craftimize-"0971e3f"]
at java.lang.ClassLoader.loadClass(ClassLoader.java:588) ~[?:?]
at java.lang.ClassLoader.loadClass(ClassLoader.java:521) ~[?:?]
at me.samgameryt.mysticcore.commands.WhoCommand.onCommand(WhoCommand.java:16) ~[?:?]
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:45) ~[server.jar:git-Craftimize-"0971e3f"]
... 11 more
>.... [13:55:15 INFO]: An internal error occurred while attempting to perform this command.