[1.12.2] Spigot核心可加载，Catserver无法加载Towny-0.99.0.0 for MC 1.12.2

[TRLWeiss]

运行环境

Minecraft版本(1.12.2/1.16.5/1.18.2): 1.12.2
构建版本(从/version指令获取): git-CatServer-1.12.2-090a6ffb (MC: 1.12.2) (Implementing API version 1.12.2-R0.1-SNAPSHOT, Forge version 14.23.5.2860)
Java版本：openjdk version "1.8.0_292"
OpenJDK Runtime Environment (build 1.8.0_292-b10)
Eclipse OpenJ9 VM (build openj9-0.26.0, JRE 1.8.0 Windows 10 amd64-64-Bit Compressed References 20210421_1045 (JIT enabled, AOT enabled)

相关模组/插件: towny-0.99.0.0_for_MC_1.12.2
描述这个BUG
参见日志文件：
(如果有报错请附上pastebin链接或上传日志文件)

Catserver
latest.log

导致的问题
使用Spigot核心无错误提示，但使用Catserver最新版本核心加载towny-0.99.0.0_for_MC_1.12.2插件后，无法运行Towny指令，且报错显示如下：
Error occurred while enabling Towny v0.99.0.0 for MC 1.12.2 (Is it up to date?)
java.lang.NoClassDefFoundError: com.palmergames.bukkit.towny.TownySettings$TownLevel
at com.palmergames.bukkit.towny.TownySettings.newTownLevel(TownySettings.java:121) ~[?:?]
at com.palmergames.bukkit.towny.TownySettings.loadTownLevelConfig(TownySettings.java:187) ~[?:?]
at com.palmergames.bukkit.towny.Towny.loadTownAndNationLevels(Towny.java:327) ~[?:?]
at com.palmergames.bukkit.towny.Towny.loadFoundation(Towny.java:262) ~[?:?]
at com.palmergames.bukkit.towny.Towny.onEnable(Towny.java:142) ~[?:?]
at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:264) ~[JavaPlugin.class:git-CatServer-1.12.2-090a6ffb]
at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:328) [JavaPluginLoader.class:git-CatServer-1.12.2-090a6ffb]
at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:405) [SimplePluginManager.class:git-CatServer-1.12.2-090a6ffb]
at org.bukkit.craftbukkit.v1_12_R1.CraftServer.enablePlugin(CraftServer.java:438) [CraftServer.class:git-CatServer-1.12.2-090a6ffb]
at org.bukkit.craftbukkit.v1_12_R1.CraftServer.enablePlugins(CraftServer.java:384) [CraftServer.class:git-CatServer-1.12.2-090a6ffb]
at net.minecraft.server.MinecraftServer.func_71247_a(MinecraftServer.java:383) [MinecraftServer.class:?]
at net.minecraft.server.dedicated.DedicatedServer.func_71197_b(DedicatedServer.java:330) [nz.class:?]
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:636) [MinecraftServer.class:?]
at java.lang.Thread.run(Thread.java:823) [?:1.8.0_292]

复现方法
安装towny-0.99.0.0_for_MC_1.12.2和Catserver核心运行服务端，会发现towny插件无法使用，即可复现本问题

截图/视频
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