[13:22:31] [User Authenticator #1/INFO]: UUID of player TechnicallyCoded is bf9c0e36-517f-4912-9197-226c937b72d6
[13:22:32] [Server thread/INFO]: TechnicallyCoded joined the game
[13:22:32] [Server thread/INFO]: TechnicallyCoded[/86.221.108.243:59732] logged in with entity id 6 at ([test]1.1088277724360096, 94.0, 1.3373409529125093)
[13:22:32] [Craft Scheduler Thread - 1/WARN]: [InventoryRollbackPlus] Plugin InventoryRollbackPlus v1.6.17 generated an exception while executing task 11
java.lang.IllegalStateException: Unable to save item stacks.
        at me.danjono.inventoryrollback.inventory.SaveInventory.toBase64(SaveInventory.java:173) ~[?:?]
        at me.danjono.inventoryrollback.data.YAML.setMainInventory(YAML.java:220) ~[?:?]
        at me.danjono.inventoryrollback.data.PlayerData.setMainInventory(PlayerData.java:145) ~[?:?]
        at me.danjono.inventoryrollback.inventory.SaveInventory.lambda$createSave$1(SaveInventory.java:115) ~[?:?]
        at org.bukkit.craftbukkit.v1_21_R1.scheduler.CraftTask.run(CraftTask.java:82) ~[spigot-1.21-R0.1-SNAPSHOT.jar:4273-Spigot-34bd42b-2c54749]
        at org.bukkit.craftbukkit.v1_21_R1.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:54) ~[spigot-1.21-R0.1-SNAPSHOT.jar:4273-Spigot-34bd42b-2c54749]
        at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144) ~[?:?]
        at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642) ~[?:?]
        at java.base/java.lang.Thread.run(Thread.java:1583) [?:?]
Caused by: java.lang.NullPointerException: null value in entry: using-converts-to=null
        at com.google.common.collect.CollectPreconditions.checkEntryNotNull(CollectPreconditions.java:33) ~[guava-32.1.2-jre.jar:?]
        at com.google.common.collect.ImmutableMapEntry.<init>(ImmutableMapEntry.java:54) ~[guava-32.1.2-jre.jar:?]
        at com.google.common.collect.ImmutableMap.entryOf(ImmutableMap.java:341) ~[guava-32.1.2-jre.jar:?]
        at com.google.common.collect.ImmutableMap$Builder.put(ImmutableMap.java:450) ~[guava-32.1.2-jre.jar:?]
        at com.google.common.collect.ImmutableMap$Builder.put(ImmutableMap.java:465) ~[guava-32.1.2-jre.jar:?]
        at com.google.common.collect.ImmutableMap$Builder.putAll(ImmutableMap.java:494) ~[guava-32.1.2-jre.jar:?]
        at com.google.common.collect.ImmutableMap$Builder.putAll(ImmutableMap.java:477) ~[guava-32.1.2-jre.jar:?]
        at org.bukkit.util.io.Wrapper.newWrapper(Wrapper.java:16) ~[spigot-api-1.21-R0.1-SNAPSHOT.jar:?]
        at org.bukkit.util.io.BukkitObjectOutputStream.replaceObject(BukkitObjectOutputStream.java:48) ~[spigot-api-1.21-R0.1-SNAPSHOT.jar:?]
        at java.base/java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1160) ~[?:?]
        at java.base/java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1394) ~[?:?]
        at java.base/java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1190) ~[?:?]
        at java.base/java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1585) ~[?:?]
        at java.base/java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1542) ~[?:?]
        at java.base/java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1451) ~[?:?]
        at java.base/java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1194) ~[?:?]
        at java.base/java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1585) ~[?:?]
        at java.base/java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1542) ~[?:?]
        at java.base/java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1451) ~[?:?]
        at java.base/java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1194) ~[?:?]
        at java.base/java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1394) ~[?:?]
        at java.base/java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1190) ~[?:?]
        at java.base/java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1585) ~[?:?]
        at java.base/java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1542) ~[?:?]
        at java.base/java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1451) ~[?:?]
        at java.base/java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1194) ~[?:?]
        at java.base/java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1585) ~[?:?]
        at java.base/java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1542) ~[?:?]
        at java.base/java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1451) ~[?:?]
        at java.base/java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1194) ~[?:?]
        at java.base/java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:358) ~[?:?]
        at me.danjono.inventoryrollback.inventory.SaveInventory.toBase64(SaveInventory.java:167) ~[?:?]
        ... 8 more
[13:23:17] [Server thread/INFO]: TechnicallyCoded issued server command: /ver
>ver
[13:23:25] [Server thread/INFO]: This server is running CraftBukkit version 4273-Spigot-34bd42b-2c54749 (MC: 1.21) (Implementing API version 1.21-R0.1-SNAPSHOT)
[13:23:25] [Server thread/INFO]: You are running the latest version
[13:28:56] [Server thread/INFO]: TechnicallyCoded issued server command: /data get block 2 94 1