Error

[roy0510]

[23:54:14 ERROR]: Could not pass event InventoryClickEvent to SafeTrade v1.1.1
java.lang.IllegalArgumentException: Cannot get ID of Modern Material
        at org.apache.commons.lang.Validate.isTrue(Validate.java:136) ~[patched_1.16.5.jar:git-Paper-761]
        at org.bukkit.Material.getId(Material.java:3626) ~[patched_1.16.5.jar:git-Paper-761]
        at de.oppermann.bastian.safetrade.util.Blacklist.isBlacklisted(Blacklist.java:70) ~[?:?]
        at de.oppermann.bastian.safetrade.listener.InventoryClickListener.onInventoryClick(InventoryClickListener.java:157) ~[?:?]
        at com.destroystokyo.paper.event.executor.asm.generated.GeneratedEventExecutor224.execute(Unknown Source) ~[?:?]
        at org.bukkit.plugin.EventExecutor.lambda$create$1(EventExecutor.java:69) ~[patched_1.16.5.jar:git-Paper-761]
        at co.aikar.timings.TimedEventExecutor.execute(TimedEventExecutor.java:76) ~[patched_1.16.5.jar:git-Paper-761]
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:70) ~[patched_1.16.5.jar:git-Paper-761]
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:624) ~[patched_1.16.5.jar:git-Paper-761]
        at net.minecraft.server.v1_16_R3.PlayerConnection.a(PlayerConnection.java:2715) ~[patched_1.16.5.jar:git-Paper-761]
        at net.minecraft.server.v1_16_R3.PacketPlayInWindowClick.a(SourceFile:32) ~[patched_1.16.5.jar:git-Paper-761]
        at net.minecraft.server.v1_16_R3.PacketPlayInWindowClick.a(SourceFile:10) ~[patched_1.16.5.jar:git-Paper-761]
        at net.minecraft.server.v1_16_R3.PlayerConnectionUtils.lambda$ensureMainThread$1(PlayerConnectionUtils.java:35) ~[patched_1.16.5.jar:git-Paper-761]
        at net.minecraft.server.v1_16_R3.TickTask.run(SourceFile:18) ~[patched_1.16.5.jar:git-Paper-761]
        at net.minecraft.server.v1_16_R3.IAsyncTaskHandler.executeTask(IAsyncTaskHandler.java:136) ~[patched_1.16.5.jar:git-Paper-761]
        at net.minecraft.server.v1_16_R3.IAsyncTaskHandlerReentrant.executeTask(SourceFile:23) ~[patched_1.16.5.jar:git-Paper-761]
        at net.minecraft.server.v1_16_R3.IAsyncTaskHandler.executeNext(IAsyncTaskHandler.java:109) ~[patched_1.16.5.jar:git-Paper-761]
        at net.minecraft.server.v1_16_R3.MinecraftServer.bb(MinecraftServer.java:1266) ~[patched_1.16.5.jar:git-Paper-761]
        at net.minecraft.server.v1_16_R3.MinecraftServer.executeNext(MinecraftServer.java:1259) ~[patched_1.16.5.jar:git-Paper-761]
        at net.minecraft.server.v1_16_R3.IAsyncTaskHandler.awaitTasks(IAsyncTaskHandler.java:119) ~[patched_1.16.5.jar:git-Paper-761]
        at net.minecraft.server.v1_16_R3.MinecraftServer.sleepForTick(MinecraftServer.java:1220) ~[patched_1.16.5.jar:git-Paper-761]
        at net.minecraft.server.v1_16_R3.MinecraftServer.w(MinecraftServer.java:1134) ~[patched_1.16.5.jar:git-Paper-761]
        at net.minecraft.server.v1_16_R3.MinecraftServer.lambda$a$0(MinecraftServer.java:291) ~[patched_1.16.5.jar:git-Paper-761]
        at java.lang.Thread.run(Thread.java:834) [?:?]```

[Bastian]

What Minecraft version what plugin version are you using?