Exception by open global-playtime-rewards GUI

[BrainRTP]

Plugin version: 3.3.0
Server:

This server is running Paper version 1.21.1-132-ver/1.21.1@b48403b (2024-11-21T10:14:27Z) (Implementing API version 1.21.1-R0.1-SNAPSHOT)
You are running the latest version

Configuration: default (no changes)

How to repeat:

1. execute by player: /rewards gui global-playtime-rewards

Stacktrace:

[11:43:33] [Server thread/INFO]: asd1 issued server command: /rewards gui global-playtime-rewards
[11:43:33] [Server thread/ERROR]: [LushRewards] Could not find item-template 'P'
[11:43:33] [Server thread/ERROR]: [LushRewards] Failed to display custom item-template 'P' as it does not specify a valid material
[11:43:33] [Server thread/WARN]: [LushRewards] Task #1446 for LushRewards v3.3.0 generated an exception
java.lang.NullPointerException: Cannot invoke "java.util.List.getClass()" because "list" is null
	at java.base/java.util.Collections.unmodifiableList(Collections.java:1474) ~[?:?]
	at LushRewards-3.3.0.jar/org.lushplugins.lushrewards.libraries.lushlib.utils.DisplayItemStack$Builder.getLore(DisplayItemStack.java:283) ~[LushRewards-3.3.0.jar:?]
	at LushRewards-3.3.0.jar/org.lushplugins.lushrewards.module.playtimerewards.PlaytimeRewardsGui.lambda$refresh$5(PlaytimeRewardsGui.java:140) ~[LushRewards-3.3.0.jar:?]
	at java.base/java.lang.Iterable.forEach(Iterable.java:75) ~[?:?]
	at LushRewards-3.3.0.jar/org.lushplugins.lushrewards.module.playtimerewards.PlaytimeRewardsGui.lambda$refresh$8(PlaytimeRewardsGui.java:108) ~[LushRewards-3.3.0.jar:?]
	at org.bukkit.craftbukkit.scheduler.CraftTask.run(CraftTask.java:86) ~[paper-1.21.1.jar:1.21.1-132-b48403b]
	at org.bukkit.craftbukkit.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:475) ~[paper-1.21.1.jar:1.21.1-132-b48403b]
	at net.minecraft.server.MinecraftServer.tickChildren(MinecraftServer.java:1724) ~[paper-1.21.1.jar:1.21.1-132-b48403b]
	at net.minecraft.server.dedicated.DedicatedServer.tickChildren(DedicatedServer.java:473) ~[paper-1.21.1.jar:1.21.1-132-b48403b]
	at net.minecraft.server.MinecraftServer.tickServer(MinecraftServer.java:1596) ~[paper-1.21.1.jar:1.21.1-132-b48403b]
	at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1302) ~[paper-1.21.1.jar:1.21.1-132-b48403b]
	at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:329) ~[paper-1.21.1.jar:1.21.1-132-b48403b]
	at java.base/java.lang.Thread.run(Thread.java:1570) ~[?:?]