Question Unsupported API

Hexanilix

New member
Dec 24, 2022
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Hey guys,
This is just a simple question (I think) about what "api-version: " version I use. I'm trying to make a 1.19.2 plugin and I'm new to all of this stuff and I can't resolve it. I searched everywhere and I can't find anything. What do I put here cuz I tried "1.19.2-R0.1-SNAPSHOT" and many other things but all gave the same result of: "org.bukkit.plugin.InvalidPluginException: Unsupported API version [...]"
 
Version Output
This server is running Paper version git-Paper-307 (MC: 1.19.2) (Implementing API version 1.19.2-R0.1-SNAPSHOT) (Git: 476ef25)
You are running the latest version
Last edited:

stefvanschie

Moderator
Staff member
Dec 17, 2021
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The api-version can be either 1.13, 1.14, 1.15, 1.16, 1.17, 1.18, or 1.19. So, only the first two numbers of the version number should be used.
 

Hexanilix

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Dec 24, 2022
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Yea it just says "org.bukkit.plugin.InvalidPluginException: java.lang.IllegalArgumentException: Plugin cannot be null" so no bueno. That's my problem NOTHING works
 

stefvanschie

Moderator
Staff member
Dec 17, 2021
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A stacktrace looks something like this:
Code:
Exception in thread "main" java.lang.NullPointerException: Oops!
    at com.ericgoebelbecker.stacktraces.StackTrace.d(StackTrace.java:29)
    at com.ericgoebelbecker.stacktraces.StackTrace.c(StackTrace.java:24)
    at com.ericgoebelbecker.stacktraces.StackTrace.b(StackTrace.java:20)
    at com.ericgoebelbecker.stacktraces.StackTrace.a(StackTrace.java:16)
    at com.ericgoebelbecker.stacktraces.StackTrace.main(StackTrace.java:9)
(Example from https://www.sentinelone.com/blog/java-stack-trace-understanding/.)

You can also provide your entire log file if you want, it'll be in there.
 

Hexanilix

New member
Dec 24, 2022
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Ah ok here:

[14:32:11 ERROR]: Could not load 'plugins/some-hex-code.jar' in folder 'plugins'
org.bukkit.plugin.InvalidPluginException: java.lang.IllegalArgumentException: Plugin cannot be null
at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:157) ~[paper-api-1.19.2-R0.1-SNAPSHOT.jar:?]
at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:411) ~[paper-api-1.19.2-R0.1-SNAPSHOT.jar:?]
at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:319) ~[paper-api-1.19.2-R0.1-SNAPSHOT.jar:?]
at org.bukkit.craftbukkit.v1_19_R1.CraftServer.loadPlugins(CraftServer.java:423) ~[paper-1.19.2.jar:git-Paper-307]
at net.minecraft.server.dedicated.DedicatedServer.initServer(DedicatedServer.java:278) ~[paper-1.19.2.jar:git-Paper-307]
at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1100) ~[paper-1.19.2.jar:git-Paper-307]
at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:305) ~[paper-1.19.2.jar:git-Paper-307]
at java.lang.Thread.run(Thread.java:1589) ~[?:?]
Caused by: java.lang.IllegalArgumentException: Plugin cannot be null
at org.apache.commons.lang.Validate.notNull(Validate.java:192) ~[commons-lang-2.6.jar:2.6]
at org.bukkit.craftbukkit.v1_19_R1.scheduler.CraftScheduler.validate(CraftScheduler.java:548) ~[paper-1.19.2.jar:git-Paper-307]
at org.bukkit.craftbukkit.v1_19_R1.scheduler.CraftScheduler.runTaskTimer(CraftScheduler.java:227) ~[paper-1.19.2.jar:git-Paper-307]
at org.bukkit.craftbukkit.v1_19_R1.scheduler.CraftScheduler.runTaskTimer(CraftScheduler.java:212) ~[paper-1.19.2.jar:git-Paper-307]
at org.bukkit.craftbukkit.v1_19_R1.scheduler.CraftScheduler.scheduleSyncRepeatingTask(CraftScheduler.java:207) ~[paper-1.19.2.jar:git-Paper-307]
at hexy_mc_code.<init>(hexy_mc_code.java:34) ~[some-hex-code.jar:?]
at jdk.internal.reflect.DirectConstructorHandleAccessor.newInstance(DirectConstructorHandleAccessor.java:67) ~[?:?]
at java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:500) ~[?:?]
at java.lang.reflect.ReflectAccess.newInstance(ReflectAccess.java:128) ~[?:?]
at jdk.internal.reflect.ReflectionFactory.newInstance(ReflectionFactory.java:306) ~[?:?]
at java.lang.Class.newInstance(Class.java:684) ~[?:?]
at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:83) ~[paper-api-1.19.2-R0.1-SNAPSHOT.jar:?]
at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:153) ~[paper-api-1.19.2-R0.1-SNAPSHOT.jar:?]
... 7 more
 
Last edited:

Hexanilix

New member
Dec 24, 2022
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Oh and this error is with the api-version in the .yml file set to this:

api-version: 1.19
 

Machine Maker

Paper Developer
Staff member
Dec 17, 2021
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California
This is a bug with your plugin. Some field or variable somewhere called “plugin” is null when it can’t be. See the line in the stack trace hexy_mc_code.<init>(hexy_mc_code.java:34) ~[some-hex-code.jar:?]? That’s a line in your plugin causing the issue. I’m guessing you are trying to schedule a task when your plugin is loaded, but are using a field “called” plugin to hold your plugin instance which hasn’t been set yet.
 

Hexanilix

New member
Dec 24, 2022
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1
Yea that's the culprit. Just found exactly that so thnx and now it works so have a nice one and Merry Christmas! (Also thnx mods for taking the time to help me :3)