Could not load 'plugins/FeatherBoard.jar' in folder 'plugins'
org.bukkit.plugin.InvalidPluginException: java.lang.UnsupportedClassVersionError: be/maximvdw/featherboard/FeatherBoard has been compiled by a more recent version of the Java Runtime (class file version 59.0), this version of the Java Runtime only recognizes class file versions up to 52.0
at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:133) ~[server.jar:git-TacoSpigot-7197d3d]
at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:328) ~[server.jar:git-TacoSpigot-7197d3d]
at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:251) [server.jar:git-TacoSpigot-7197d3d]
at org.bukkit.craftbukkit.v1_8_R3.CraftServer.loadPlugins(CraftServer.java:309) [server.jar:git-TacoSpigot-7197d3d]
at net.minecraft.server.v1_8_R3.DedicatedServer.init(DedicatedServer.java:215) [server.jar:git-TacoSpigot-7197d3d]
at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:569) [server.jar:git-TacoSpigot-7197d3d]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_282]
Caused by: java.lang.UnsupportedClassVersionError: be/maximvdw/featherboard/FeatherBoard has been compiled by a more recent version of the Java Runtime (class file version 59.0), this version of the Java Runtime only recognizes class file versions up to 52.0
at java.lang.ClassLoader.defineClass1(Native Method) ~[?:1.8.0_282]
at java.lang.ClassLoader.defineClass(ClassLoader.java:756) ~[?:1.8.0_282]
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) ~[?:1.8.0_282]
at java.net.URLClassLoader.defineClass(URLClassLoader.java:468) ~[?:1.8.0_282]
at java.net.URLClassLoader.access$100(URLClassLoader.java:74) ~[?:1.8.0_282]
at java.net.URLClassLoader$1.run(URLClassLoader.java:369) ~[?:1.8.0_282]
at java.net.URLClassLoader$1.run(URLClassLoader.java:363) ~[?:1.8.0_282]
at java.security.AccessController.doPrivileged(Native Method) ~[?:1.8.0_282]
at java.net.URLClassLoader.findClass(URLClassLoader.java:362) ~[?:1.8.0_282]
at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:102) ~[server.jar:git-TacoSpigot-7197d3d]
at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:87) ~[server.jar:git-TacoSpigot-7197d3d]
at java.lang.ClassLoader.loadClass(ClassLoader.java:418) ~[?:1.8.0_282]
at java.lang.ClassLoader.loadClass(ClassLoader.java:351) ~[?:1.8.0_282]
at java.lang.Class.forName0(Native Method) ~[?:1.8.0_282]
at java.lang.Class.forName(Class.java:348) ~[?:1.8.0_282]
at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:65) ~[server.jar:git-TacoSpigot-7197d3d]
at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:129) ~[server.jar:git-TacoSpigot-7197d3d]
... 6 more