Fix error in 1.16
[18:21:20] [Server thread/ERROR]: Could not load 'plugins/BattleMusic 3.0.jar' in folder 'plugins' org.bukkit.plugin.InvalidPluginException: Unsupported API version 1.18 at org.bukkit.craftbukkit.v1_16_R3.util.CraftMagicNumbers.checkSupported(CraftMagicNumbers.java:361) ~[patched_1.16.5.jar:git-Paper-637] at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:133) ~[patched_1.16.5.jar:git-Paper-637] at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:397) ~[patched_1.16.5.jar:git-Paper-637] at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:305) ~[patched_1.16.5.jar:git-Paper-637] at org.bukkit.craftbukkit.v1_16_R3.CraftServer.loadPlugins(CraftServer.java:389) ~[patched_1.16.5.jar:git-Paper-637] at net.minecraft.server.v1_16_R3.DedicatedServer.init(DedicatedServer.java:252) ~[patched_1.16.5.jar:git-Paper-637] at net.minecraft.server.v1_16_R3.MinecraftServer.w(MinecraftServer.java:1065) ~[patched_1.16.5.jar:git-Paper-637] at net.minecraft.server.v1_16_R3.MinecraftServer.lambda$a$0(MinecraftServer.java:289) ~[patched_1.16.5.jar:git-Paper-637] at java.lang.Thread.run(Thread.java:834) [?:?]
Fix error in 1.16
[18:21:20] [Server thread/ERROR]: Could not load 'plugins/BattleMusic 3.0.jar' in folder 'plugins' org.bukkit.plugin.InvalidPluginException: Unsupported API version 1.18 at org.bukkit.craftbukkit.v1_16_R3.util.CraftMagicNumbers.checkSupported(CraftMagicNumbers.java:361) ~[patched_1.16.5.jar:git-Paper-637] at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:133) ~[patched_1.16.5.jar:git-Paper-637] at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:397) ~[patched_1.16.5.jar:git-Paper-637] at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:305) ~[patched_1.16.5.jar:git-Paper-637] at org.bukkit.craftbukkit.v1_16_R3.CraftServer.loadPlugins(CraftServer.java:389) ~[patched_1.16.5.jar:git-Paper-637] at net.minecraft.server.v1_16_R3.DedicatedServer.init(DedicatedServer.java:252) ~[patched_1.16.5.jar:git-Paper-637] at net.minecraft.server.v1_16_R3.MinecraftServer.w(MinecraftServer.java:1065) ~[patched_1.16.5.jar:git-Paper-637] at net.minecraft.server.v1_16_R3.MinecraftServer.lambda$a$0(MinecraftServer.java:289) ~[patched_1.16.5.jar:git-Paper-637] at java.lang.Thread.run(Thread.java:834) [?:?]