Bug in 1.21

[Mapacheee]

What behavior is observed:

I've this error:
[01:11:43] [Server thread/INFO]: [ChangeSkin] Enabling ChangeSkin v3.2-SNAPSHOT-704b682
[01:11:43] [Server thread/ERROR]: Error occurred while enabling ChangeSkin v3.2-SNAPSHOT-704b682 (Is it up to date?)
java.lang.NoSuchMethodError: org.yaml.snakeyaml.representer.Representer: method 'void ()' not found
at ChangeSkinBukkit.jar/changeskin.config.YamlConfiguration$1$1.(YamlConfiguration.java:33) ~[ChangeSkinBukkit.jar:?]
at ChangeSkinBukkit.jar/changeskin.config.YamlConfiguration$1.initialValue(YamlConfiguration.java:32) ~[ChangeSkinBukkit.jar:?]
at ChangeSkinBukkit.jar/changeskin.config.YamlConfiguration$1.initialValue(YamlConfiguration.java:28) ~[ChangeSkinBukkit.jar:?]
at java.base/java.lang.ThreadLocal.setInitialValue(ThreadLocal.java:225) ~[?:?]
at java.base/java.lang.ThreadLocal.get(ThreadLocal.java:194) ~[?:?]
at java.base/java.lang.ThreadLocal.get(ThreadLocal.java:172) ~[?:?]
at ChangeSkinBukkit.jar/changeskin.config.YamlConfiguration.load(YamlConfiguration.java:111) ~[ChangeSkinBukkit.jar:?]
at ChangeSkinBukkit.jar/changeskin.config.YamlConfiguration.load(YamlConfiguration.java:104) ~[ChangeSkinBukkit.jar:?]
at ChangeSkinBukkit.jar/com.github.games647.changeskin.core.ChangeSkinCore.loadFile(ChangeSkinCore.java:180) ~[ChangeSkinBukkit.jar:?]
at ChangeSkinBukkit.jar/com.github.games647.changeskin.core.ChangeSkinCore.load(ChangeSkinCore.java:62) ~[ChangeSkinBukkit.jar:?]
at ChangeSkinBukkit.jar/com.github.games647.changeskin.bukkit.ChangeSkinBukkit.onEnable(ChangeSkinBukkit.java:57) ~[ChangeSkinBukkit.jar:?]
at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:288) ~[paper-mojangapi-1.21-R0.1-SNAPSHOT.jar:?]
at io.papermc.paper.plugin.manager.PaperPluginInstanceManager.enablePlugin(PaperPluginInstanceManager.java:202) ~[divinemc-1.21.jar:1.21-396-6186ead]
at io.papermc.paper.plugin.manager.PaperPluginManagerImpl.enablePlugin(PaperPluginManagerImpl.java:109) ~[divinemc-1.21.jar:1.21-396-6186ead]
at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:520) ~[paper-mojangapi-1.21-R0.1-SNAPSHOT.jar:?]
at org.bukkit.craftbukkit.CraftServer.enablePlugin(CraftServer.java:658) ~[divinemc-1.21.jar:1.21-396-6186ead]
at org.bukkit.craftbukkit.CraftServer.enablePlugins(CraftServer.java:607) ~[divinemc-1.21.jar:1.21-396-6186ead]
at net.minecraft.server.MinecraftServer.loadWorld0(MinecraftServer.java:753) ~[divinemc-1.21.jar:1.21-396-6186ead]
at net.minecraft.server.MinecraftServer.loadLevel(MinecraftServer.java:515) ~[divinemc-1.21.jar:1.21-396-6186ead]
at net.minecraft.server.dedicated.DedicatedServer.initServer(DedicatedServer.java:371) ~[divinemc-1.21.jar:1.21-396-6186ead]
at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1225) ~[divinemc-1.21.jar:1.21-396-6186ead]
at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:330) ~[divinemc-1.21.jar:1.21-396-6186ead]
at java.base/java.lang.Thread.run(Thread.java:1583) ~[?:?]
[01:11:43] [Server thread/INFO]: [ChangeSkin] Disabling ChangeSkin v3.2-SNAPSHOT-704b682

What behavior is expected:

Steps/models to reproduce:

Put ChangeSkin in plugins folder

Screenshots (if applicable)

Plugin list:

pl
[01:13:24 INFO]: Paper Plugins: (3):
[01:13:24 INFO]: - FancyHolograms, FancyNpcs, HuskChat
[01:13:24 INFO]: Bukkit Plugins: (22):
[01:13:24 INFO]: - AlonsoJoin, AlonsoLib, ChangeSkin, CommandPanels, Essentials, EssentialsSpawn, FastAsyncWorldEdit, Images, LibertyBans, LuckPerms
[01:13:24 INFO]: NBTAPI, packetevents, PlaceholderAPI, ProtocolLib, SystemChat, TAB, UnlimitedNameTags, Vault, VoidGen, VoidSpawn
[01:13:24 INFO]: WorldGuard, XPad

Environment description

DivineMC lastest version

Plugin version or build number (don't write latest):

ChangeSkin 474
//: # (This can be found by running /version plugin-name.)

Server Log:

Hastebin / Gist link of the error, stacktrace or the complete log (if any)

Configuration:

Hastebin / Gist link of your config.yml file
Default config