Could not load 'plugins\HelloWorld.jar' in folder 'plugins' org.bukkit.plugin.InvalidDescriptionException: commands are of wrong type

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Hi Y`all i recently start coding in java to make minecraft plugins and that sort of thing i just started doin this type of thing about a month ago and learned how to do all of the fun stuff in eclipse to start my project, i have looked at a bunch of tutorials but all of them basicly dont work because i get this error every time, if anyone could help that would be fanstastic.

This is the error message when i load it up

[16:52:22] [Server thread/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:969) ~[spigot-1.14.4.jar:git-Spigot-cbd1a1b-009d8af] at org.bukkit.plugin.PluginDescriptionFile.(PluginDescriptionFile.java:240) ~[spigot-1.14.4.jar:git-Spigot-cbd1a1b-009d8af] at org.bukkit.plugin.java.JavaPluginLoader.getPluginDescription(JavaPluginLoader.java:165) ~[spigot-1.14.4.jar:git-Spigot-cbd1a1b-009d8af] at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:138) [spigot-1.14.4.jar:git-Spigot-cbd1a1b-009d8af] at org.bukkit.craftbukkit.v1_14_R1.CraftServer.loadPlugins(CraftServer.java:350) [spigot-1.14.4.jar:git-Spigot-cbd1a1b-009d8af] at net.minecraft.server.v1_14_R1.DedicatedServer.init(DedicatedServer.java:202) [spigot-1.14.4.jar:git-Spigot-cbd1a1b-009d8af] at net.minecraft.server.v1_14_R1.MinecraftServer.run(MinecraftServer.java:775) [spigot-1.14.4.jar:git-Spigot-cbd1a1b-009d8af] at java.lang.Thread.run(Unknown Source) [?:1.8.0_251] Caused by: java.lang.ClassCastException: java.lang.String cannot be cast to java.util.Map at org.bukkit.plugin.PluginDescriptionFile.loadMap(PluginDescriptionFile.java:951) ~[spigot-1.14.4.jar:git-Spigot-cbd1a1b-009d8af] ... 7 more

Please help how do i fix this!!

(btw i would link the plugin.yml and Main, and all that stuff but idk how so if someone can reply to this and tell me how to do that i can post that too, thank you any help is very aprreciated)

bukkit minecraft server java
1 Answers

Minecraft avid here. Check your YML format through http://www.yamllint.com/ or any other YML validator.

Take an example:

Wrong format

name: HelloWorld
main: com.company.HelloWorld
version: 1.0
commands:
  hello:
  description: testing   //description should take more indent than above because it's inside region
  usage: /helloworld
  aliases: [helloworld]

Correct format

name: HelloWorld
main: com.company.HelloWorld
version: 1.0
commands:
  hello:
    description: testing   //correct one
    usage: /helloworld
    aliases: [helloworld]
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