skrayfall ERORR

[myasan]

I added skrayfall to the server, but it keeps getting errors.

MY mincraft version is 1.16.5
java version is 11
bukkit is Arclight
My skript version is 2.6.4

[Server thread/ERROR] [Minecraft/]: Error occurred while enabling skRayFall v1.9.25 (Is it up to date?)
java.lang.IllegalArgumentException: Can't register net.rayfall.eyesniper2.skrayfall.bossbar.RayFallBarColor with the code name bossbarcolor because that name is already used by bossbarcolors, bossbarcolours, bossbar colours, bar colours, bossbar colors, bar colors, barcolour
at ch.njol.skript.registrations.Classes.registerClass(Classes.java:91) ~[?:?] {re:classloading,re:classloading,re:classloading,re:classloading,re:classloading,re:classloading}
at net.rayfall.eyesniper2.skrayfall.TypeManager.registerV1_9Elements(TypeManager.java:78) ~[?:?] {re:classloading,re:classloading,re:classloading}
at net.rayfall.eyesniper2.skrayfall.TypeManager.registerSyntax(TypeManager.java:30) ~[?:?] {re:classloading,re:classloading,re:classloading}
at net.rayfall.eyesniper2.skrayfall.Core.onEnable(Core.java:70) ~[?:?] {re:classloading,re:classloading,re:classloading}
at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPluginMixin.java:263) ~[arclight:arclight-1.16.5-1.0.23-daa3c8bb] {re:mixin,re:classloading,pl:mixin:APP:mixins.arclight.bukkit.json:JavaPluginMixin,pl:mixin:A,re:mixin}
at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoaderMixin.java:342) ~[arclight:arclight-1.16.5-1.0.23-daa3c8bb] {re:mixin,re:classloading,pl:mixin:APP:mixins.arclight.bukkit.json:JavaPluginLoaderMixin,pl:mixin:A}
at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:480) ~[arclight:arclight-1.16.5-1.0.23-daa3c8bb] {re:classloading,re:mixin}
at org.bukkit.craftbukkit.v1_16_R3.CraftServer.enablePlugin(CraftServerMixin.java:492) ~[arclight:arclight-1.16.5-1.0.23-daa3c8bb] {re:mixin,re:classloading,pl:mixin:APP:mixins.arclight.bukkit.json:CraftServerMixin,pl:mixin:A,pl:arclight_implementer:switch,pl:arclight_implementer:A,re:mixin}
at org.bukkit.craftbukkit.v1_16_R3.CraftServer.enablePlugins(CraftServerMixin.java:406) ~[arclight:arclight-1.16.5-1.0.23-daa3c8bb] {re:mixin,re:classloading,pl:mixin:APP:mixins.arclight.bukkit.json:CraftServerMixin,pl:mixin:A,pl:arclight_implementer:switch,pl:arclight_implementer:A,re:mixin}
at net.minecraft.server.MinecraftServer.handler$zpo000$arclight$enablePlugins(MinecraftServerMixin.java:1977) ~[?:?] {re:mixin,pl:accesstransformer:B,pl:runtimedistcleaner:A,re:classloading,pl:accesstransformer:B,pl:mixin:APP:mixins.arclight.core.json:server.MinecraftServerMixin,pl:mixin:A,pl:runtimedistcleaner:A,re:mixin,pl:accesstransformer:B,pl:runtimedistcleaner:A}
at net.minecraft.server.MinecraftServer.func_240787_a_(MinecraftServerMixin.java:382) ~[?:?] {re:mixin,pl:accesstransformer:B,pl:runtimedistcleaner:A,re:classloading,pl:accesstransformer:B,pl:mixin:APP:mixins.arclight.core.json:server.MinecraftServerMixin,pl:mixin:A,pl:runtimedistcleaner:A,re:mixin,pl:accesstransformer:B,pl:runtimedistcleaner:A}
at net.minecraft.server.MinecraftServer.func_240800_l__(MinecraftServerMixin.java:308) ~[?:?] {re:mixin,pl:accesstransformer:B,pl:runtimedistcleaner:A,re:classloading,pl:accesstransformer:B,pl:mixin:APP:mixins.arclight.core.json:server.MinecraftServerMixin,pl:mixin:A,pl:runtimedistcleaner:A,re:mixin,pl:accesstransformer:B,pl:runtimedistcleaner:A}
at net.minecraft.server.dedicated.DedicatedServer.func_71197_b(DedicatedServerMixin.java:168) ~[?:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:mixins.arclight.core.json:server.dedicated.DedicatedServerMixin,pl:mixin:A,re:mixin,pl:accesstransformer:B}
at net.minecraft.server.MinecraftServer.func_240802_v_(MinecraftServerMixin.java:1861) ~[?:?] {re:mixin,pl:accesstransformer:B,pl:runtimedistcleaner:A,re:classloading,pl:accesstransformer:B,pl:mixin:APP:mixins.arclight.core.json:server.MinecraftServerMixin,pl:mixin:A,pl:runtimedistcleaner:A,re:mixin,pl:accesstransformer:B,pl:runtimedistcleaner:A}
at net.minecraft.server.MinecraftServer.func_240783_a_(MinecraftServerMixin.java:232) ~[?:?] {re:mixin,pl:accesstransformer:B,pl:runtimedistcleaner:A,re:classloading,pl:accesstransformer:B,pl:mixin:APP:mixins.arclight.core.json:server.MinecraftServerMixin,pl:mixin:A,pl:runtimedistcleaner:A,re:mixin,pl:accesstransformer:B,pl:runtimedistcleaner:A}
at java.lang.Thread.run(Thread.java:834) [?:?] {}



How can I solve this problem?