[10:44:28 ERROR]: Could not load 'plugins/HelloWorld.jar' in folder 'plugins'
org.bukkit.plugin.InvalidDescriptionException: commands are of wrong type
	at org.bukkit.plugin.PluginDescriptionFile.loadMap(PluginDescriptionFile.java:924) ~[Paper-1.12.2-b1574.jar:git-Paper-1574]
	at org.bukkit.plugin.PluginDescriptionFile.<init>(PluginDescriptionFile.java:228) ~[Paper-1.12.2-b1574.jar:git-Paper-1574]
	at org.bukkit.plugin.java.JavaPluginLoader.getPluginDescription(JavaPluginLoader.java:155) ~[Paper-1.12.2-b1574.jar:git-Paper-1574]
	at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:136) ~[Paper-1.12.2-b1574.jar:git-Paper-1574]
	at org.bukkit.craftbukkit.v1_12_R1.CraftServer.loadPlugins(CraftServer.java:318) ~[Paper-1.12.2-b1574.jar:git-Paper-1574]
	at net.minecraft.server.v1_12_R1.DedicatedServer.init(DedicatedServer.java:222) ~[Paper-1.12.2-b1574.jar:git-Paper-1574]
	at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:616) ~[Paper-1.12.2-b1574.jar:git-Paper-1574]
	at java.lang.Thread.run(Thread.java:830) [?:?]
Caused by: java.lang.ClassCastException: class java.lang.String cannot be cast to class java.util.Map (java.lang.String and java.util.Map are in module java.base of loader 'bootstrap')
	at org.bukkit.plugin.PluginDescriptionFile.loadMap(PluginDescriptionFile.java:903) ~[Paper-1.12.2-b1574.jar:git-Paper-1574]
	... 7 more