I don't know what that mean whitj essentials chat

[KikyoC]

rror occurred while enabling EssentialsChat v2.17.0.0 (Is it up to date?)
java.lang.NoClassDefFoundError: com/earth2me/essentials/metrics/Metrics
at com.earth2me.essentials.chat.EssentialsChat.onEnable(EssentialsChat.java:43) ~[?:?]
at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:321) ~[server.jar:git-Spigot-db6de12-18fbb24]
at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:340) [server.jar:git-Spigot-db6de12-18fbb24]
at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:405) [server.jar:git-Spigot-db6de12-18fbb24]
at org.bukkit.craftbukkit.v1_8_R3.CraftServer.loadPlugin(CraftServer.java:357) [server.jar:git-Spigot-db6de12-18fbb24]
at org.bukkit.craftbukkit.v1_8_R3.CraftServer.enablePlugins(CraftServer.java:317) [server.jar:git-Spigot-db6de12-18fbb24]
at net.minecraft.server.v1_8_R3.MinecraftServer.s(MinecraftServer.java:414) [server.jar:git-Spigot-db6de12-18fbb24]
at net.minecraft.server.v1_8_R3.MinecraftServer.k(MinecraftServer.java:378) [server.jar:git-Spigot-db6de12-18fbb24]
at net.minecraft.server.v1_8_R3.MinecraftServer.a(MinecraftServer.java:333) [server.jar:git-Spigot-db6de12-18fbb24]
at net.minecraft.server.v1_8_R3.DedicatedServer.init(DedicatedServer.java:263) [server.jar:git-Spigot-db6de12-18fbb24]
at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:525) [server.jar:git-Spigot-db6de12-18fbb24]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_282]
at java.net.URLClassLoader.findClass(URLClassLoader.java:382) ~[?:1.8.0_282]
at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:101) ~[server.jar:git-Spigot-db6de12-18fbb24]
at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:86) ~[server.jar:git-Spigot-db6de12-18fbb24]
at java.lang.ClassLoader.loadClass(ClassLoader.java:418) ~[?:1.8.0_282]
at java.lang.ClassLoader.loadClass(ClassLoader.java:351) ~[?:1.8.0_282]
... 12 more

[osfanbuff63]

What version of Essentials are you running? I'm not an expert, but I think you have mismatched versions. That means you are probably running a core EssentialsX version different from the Essentials Chat version.

[KikyoC]

It's the same i downloaded 2 plugins on the same website in same time

[Chew]

One JAR is 2.17.0 so I have no clue where you actually downloaded it from so I'm sure it's not https://essentialsx.net (the only place you should download from). Or you did, but didn't delete older jars.