✓ [40 USD] Core - Ranks, Permissions, Punishments, Reports, NameMC, Staff Chat, MySQL 2019-04-26

27.12 13:57:16 [Server] WARNING Error enabling plugin Core
27.12 13:57:16 [Server] INFO java.lang.NoClassDefFoundError: org/bukkit/plugin/java/JavaPlugin
27.12 13:57:16 [Server] INFO at java.lang.ClassLoader.defineClass1(Native Method)
27.12 13:57:16 [Server] INFO at java.lang.ClassLoader.defineClass(ClassLoader.java:763)
27.12 13:57:16 [Server] INFO at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
27.12 13:57:16 [Server] INFO at java.net.URLClassLoader.defineClass(URLClassLoader.java:468)
27.12 13:57:16 [Server] INFO at java.net.URLClassLoader.access$100(URLClassLoader.java:74)
27.12 13:57:16 [Server] INFO at java.net.URLClassLoader$1.run(URLClassLoader.java:369)
27.12 13:57:16 [Server] INFO at java.net.URLClassLoader$1.run(URLClassLoader.java:363)
27.12 13:57:16 [Server] INFO at java.security.AccessController.doPrivileged(Native Method)
27.12 13:57:16 [Server] INFO at java.net.URLClassLoader.findClass(URLClassLoader.java:362)
27.12 13:57:16 [Server] INFO at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
27.12 13:57:16 [Server] INFO at net.md_5.bungee.api.plugin.PluginClassloader.loadClass0(PluginClassloader.java:34)
27.12 13:57:16 [Server] INFO at net.md_5.bungee.api.plugin.PluginClassloader.loadClass(PluginClassloader.java:27)
27.12 13:57:16 [Server] INFO at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
27.12 13:57:16 [Server] INFO at net.md_5.bungee.api.plugin.PluginManager.enablePlugin(PluginManager.java:324)
27.12 13:57:16 [Server] INFO at net.md_5.bungee.api.plugin.PluginManager.loadPlugins(PluginManager.java:232)
27.12 13:57:16 [Server] INFO at net.md_5.bungee.BungeeCord.start(BungeeCord.java:274)
27.12 13:57:16 [Server] INFO at net.md_5.bungee.BungeeCordLauncher.main(BungeeCordLauncher.java:116)
27.12 13:57:16 [Server] INFO at net.md_5.bungee.Bootstrap.main(Bootstrap.java:15)
27.12 13:57:16 [Server] INFO Caused by: java.lang.ClassNotFoundException: org.bukkit.plugin.java.JavaPlugin
27.12 13:57:16 [Server] INFO at net.md_5.bungee.api.plugin.PluginClassloader.loadClass0(PluginClassloader.java:53)
27.12 13:57:16 [Server] INFO at net.md_5.bungee.api.plugin.PluginClassloader.loadClass(PluginClassloader.java:27)
27.12 13:57:16 [Server] INFO at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
27.12 13:57:16 [Server] INFO ... 18 more

how to install this?

Error https://hastebin.com/omilemagiy.bash