[Bug] NullPointerException

[ImYenil]

Describe the bug
Using Citizens dev builds, open command throws error

How to reproduce
Steps to reproduce the behavior:

1. Download dev builds citizens
2. use open command
3. get error
   Screenshots
   If applicable, add screenshots to help explain your problem.

Server Information (please complete the following information):

• OS: [e.g. Linux, Windows] Windows
• Server Software: [e.g. Paper, Spigot] Paper
• Software Version: [e.g. 1.8.9] 1.8.8
• BedWars1058 Version: [e.g. 21.10.1] 23.12.1-SNAPSHOT
• Cosmetics Addon: [e.g. 1.1.1] 1.2.1

Additional context

[13:00:21 WARN]: [BedWars1058] Task #260310 for BedWars1058 v23.12.1-SNAPSHOT generated an exception
org.bukkit.command.CommandException: Unhandled exception executing 'cosmetic menu' in am.mher.cosmetics.YvCZoyJ.bo_fx1X(cosmetic)
at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:152) ~[Hypickle-Server-1.8.8-R0.1-SNAPSHOT.jar:git-Carbon-unknown]
at org.bukkit.craftbukkit.v1_8_R3.CraftServer.dispatchCommand(CraftServer.java:691) ~[Hypickle-Server-1.8.8-R0.1-SNAPSHOT.jar:git-Carbon-unknown]
at org.bukkit.Bukkit.dispatchCommand(Bukkit.java:581) ~[Hypickle-Server-1.8.8-R0.1-SNAPSHOT.jar:git-Carbon-unknown]
at com.andrei1058.bedwars.listeners.Interact.lambda$onItemCommand$0(Interact.java:95) ~[?:?]
at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftTask.run(CraftTask.java:59) ~[Hypickle-Server-1.8.8-R0.1-SNAPSHOT.jar:git-Carbon-unknown]
at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:351) ~[Hypickle-Server-1.8.8-R0.1-SNAPSHOT.jar:git-Carbon-unknown]
at net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:804) ~[Hypickle-Server-1.8.8-R0.1-SNAPSHOT.jar:git-Carbon-unknown]
at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:387) ~[Hypickle-Server-1.8.8-R0.1-SNAPSHOT.jar:git-Carbon-unknown]
at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:734) ~[Hypickle-Server-1.8.8-R0.1-SNAPSHOT.jar:git-Carbon-unknown]
at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:631) ~[Hypickle-Server-1.8.8-R0.1-SNAPSHOT.jar:git-Carbon-unknown]
at java.lang.Thread.run(Thread.java:834) ~[?:?]
Caused by: java.lang.NullPointerException
at am.mher.cosmetics.NyOxTKE.KvQLx7n.setContents(Unknown Source) ~[?:?]
at am.mher.cosmetics.api.menu.Menu.open(Unknown Source) ~[?:?]
at am.mher.cosmetics.a6Vf2fa.ryo5cT$.execute(Unknown Source) ~[?:?]
at am.mher.cosmetics.YvCZoyJ.bo_fx1X.execute(Unknown Source) ~[?:?]
at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:143) ~[Hypickle-Server-1.8.8-R0.1-SNAPSHOT.jar:git-Carbon-unknown]
... 10 more