[16:19:49] Error occurred while enabling SDTMessages v1.3.0 (Is it up to date?) [16:19:49] java.lang.NoClassDefFoundError: net/md_5/bungee/api/ChatColor [16:19:49] at me.sdtmessages.main.onEnable(main.java:44) ~[?:?] [16:19:49] at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:264) ~[craftbukkit-1.13.2-1930.jar:git-Bukkit-f3f2fe5] [16:19:49] at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:331) [craftbukkit-1.13.2-1930.jar:git-Bukkit-f3f2fe5] [16:19:49] at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:402) [craftbukkit-1.13.2-1930.jar:git-Bukkit-f3f2fe5] [16:19:49] at org.bukkit.craftbukkit.v1_13_R2.CraftServer.enablePlugin(CraftServer.java:418) [craftbukkit-1.13.2-1930.jar:git-Bukkit-f3f2fe5] [16:19:49] at org.bukkit.craftbukkit.v1_13_R2.CraftServer.enablePlugins(CraftServer.java:344) [craftbukkit-1.13.2-1930.jar:git-Bukkit-f3f2fe5] [16:19:49] at net.minecraft.server.v1_13_R2.MinecraftServer.l(MinecraftServer.java:575) [craftbukkit-1.13.2-1930.jar:git-Bukkit-f3f2fe5] [16:19:49] at net.minecraft.server.v1_13_R2.MinecraftServer.a(MinecraftServer.java:537) [craftbukkit-1.13.2-1930.jar:git-Bukkit-f3f2fe5]
[16:19:49] Caused by: java.lang.ClassNotFoundException: net.md_5.bungee.api.ChatColor [16:19:49] at java.net.URLClassLoader.findClass(URLClassLoader.java:381) ~[?:1.8.0_131] [16:19:49] at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:130) ~[craftbukkit-1.13.2-1930.jar:git-Bukkit-f3f2fe5] [16:19:49] at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:76) ~[craftbukkit-1.13.2-1930.jar:git-Bukkit-f3f2fe5] [16:19:49] at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.8.0_131]

If you use 1.13 server, you must look sounds name, because sounds name are different than 1.8.
Example:
In 1.8 sound name: ORB_PICKUP
In 1.13 sound name: ENTITY_EXPERIENCE_ORB_PICKUP
If you want look 1.13.2 sound names: https://hub.spigotmc.org/javadocs/bukkit/org/bukkit/Sound.html