/mv version -p output

[14:07:14] [WARN]: java.lang.NullPointerException: Cannot invoke "org.bukkit.World$Environment.toString()" because the return value of "com.onarandombox.MultiverseCore.MVWorld.getEnvironment()" is null [14:07:14] [WARN]: at com.onarandombox.MultiverseCore.MVWorld.toString(MVWorld.java:1212) [14:07:14] [WARN]: at java.base/java.lang.String.valueOf(String.java:4215) [14:07:14] [WARN]: at java.base/java.lang.StringBuilder.append(StringBuilder.java:173) [14:07:14] [WARN]: at java.base/java.util.concurrent.ConcurrentHashMap$CollectionView.toString(ConcurrentHashMap.java:4526) [14:07:14] [WARN]: at java.base/java.lang.String.valueOf(String.java:4215) [14:07:14] [WARN]: at java.base/java.lang.StringBuilder.append(StringBuilder.java:173) [14:07:14] [WARN]: at com.onarandombox.MultiverseCore.commands.VersionCommand.getLegacyString(VersionCommand.java:58) [14:07:14] [WARN]: at com.onarandombox.MultiverseCore.commands.VersionCommand.addVersionInfoToEvent(VersionCommand.java:113) [14:07:14] [WARN]: at com.onarandombox.MultiverseCore.commands.VersionCommand.runCommand(VersionCommand.java:137) [14:07:14] [WARN]: at com.onarandombox.commandhandler.CommandHandler.checkAndRunCommand(CommandHandler.java:296) [14:07:14] [WARN]: at com.onarandombox.commandhandler.CommandHandler.processFoundCommands(CommandHandler.java:143) [14:07:14] [WARN]: at com.onarandombox.commandhandler.CommandHandler.locateAndRunCommand(CommandHandler.java:93) [14:07:14] [WARN]: at com.onarandombox.MultiverseCore.MultiverseCore.onCommand(MultiverseCore.java:839) [14:07:14] [WARN]: at TRANSFORMER/[email protected]/org.bukkit.command.PluginCommand.execute(PluginCommand.java:45) [14:07:14] [WARN]: at TRANSFORMER/[email protected]/org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:148) [14:07:14] [WARN]: at TRANSFORMER/[email protected]/org.bukkit.craftbukkit.v1_18_R2.CraftServer.dispatchCommand(CraftServer.java:775) [14:07:14] [WARN]: at TRANSFORMER/[email protected]/org.bukkit.craftbukkit.v1_18_R2.CraftServer.dispatchServerCommand(CraftServer.java:761) [14:07:14] [WARN]: at TRANSFORMER/[email protected]/net.minecraft.server.dedicated.DedicatedServer.m_139665_(DedicatedServer.java:399) [14:07:14] [WARN]: at TRANSFORMER/[email protected]/net.minecraft.server.dedicated.DedicatedServer.m_5703_(DedicatedServer.java:377) [14:07:14] [WARN]: at TRANSFORMER/[email protected]/net.minecraft.server.MinecraftServer.m_5705_(MinecraftServer.java:966) [14:07:14] [WARN]: at TRANSFORMER/[email protected]/net.minecraft.server.MinecraftServer.m_130011_(MinecraftServer.java:789) [14:07:14] [WARN]: at TRANSFORMER/[email protected]/net.minecraft.server.MinecraftServer.m_177918_(MinecraftServer.java:286) [14:07:14] [WARN]: at java.base/java.lang.Thread.run(Thread.java:833) [14:07:14] [INFO]: An internal error occurred when attempting to perform this command. [14:07:14] [INFO]: Details were printed to the server console and logs, please add that to your bug report.

Server logs

https://mclo.gs/HnpEe7z

Server Version

This server is running Mohist version 1.18.2 (MC: 1.18.2) (Implementing API version 1.18.2-R0.1-SNAPSHOT, Forge version 40.1.51)

Bug Description

Im trying install many versions of the plugins but it doesn´t work in 1.18.2. When i try create a world it says failed, the same thing that when I try to import a world. I cant see the version of the plugins with the command but the version I installed is
Multiverse-Core-4.3.1.jar. Thanks for the help

Steps to reproduce

1. Start a server in 1.18.2 with multiverse installed
2. Try to import o create a world
3. It failed all the times

Agreements

• I have searched for and ensured there isn't already an open or resolved issue(s) regarding this.
• I was able to reproduce my issue on a freshly setup and up-to-date server with the latest version of Multiverse plugins with no other plugins and with no kinds of other server or client mods.

It looks like source of your problem is this error message:

[Server thread/WARN] [/]: java.lang.NullPointerException: Cannot invoke "org.bukkit.World$Environment.ordinal()" because the return value of "org.bukkit.WorldCreator.environment()" is null
[Server thread/WARN] [/]: 	at TRANSFORMER/forge@40.1.51/org.bukkit.craftbukkit.v1_18_R2.CraftServer.createWorld(CraftServer.java:982)

I don't think this is a problem with Multiverse but, instead with the Mohist server you're using. I haven't used Mohist before, but this PSA by EssentialsX suggests that the way Mohist combines Bukkit and Forge often leads to errors like this. It looks like the code causing this problem is indeed in a modified version of the CraftServer class made by Mohist. When I tried this using a Spigot 1.18.2 server, Multiverse worked as intended, so I think you'll find a better solution by making a report on Mohist's Github repository.

Well, Mohist might be able to fix the problem on their side if you made a report on their project, so you would be able to use Multiverse with Mohist.

Looking for alternatives, it looks like Magma is pretty similar to Mohist, claiming to support both forge and spigot. Maybe their implementation works better and is compatible with Multiverse?

You could also find a Forge mod that has a similar function to Multiverse. It looks like Multiworld is a Forge and Paper mod with the basic functionality of Multiverse. While it doesn't have as many features, it might be good enough for what you want to do.

Yes I know, Y tried it in only spigot versions and it works perfectly but the problem is when I try to put in it servers with plugins and mods. I tried mohist and magma in many versions but it didn't work. Do you know some software to put mods and plugins in 1.18.2 and multiverse works in it?

Sorry I close it XD, so the problem is that. How can I get a server with plugins and mods in 1.18.2 and multiverse core works on it

Really thanks for the help