Using WorldEdit commands kicks client with "Internal Exception: io.netty.handler.codec.DecoderException"

[RalphORama]

Versions

WorldEdit version:

[23:08:32 INFO]: WorldEdit version 7.2.0-rc-01
[23:08:32 INFO]: https://github.com/EngineHub/WorldEdit/
[23:08:32 INFO]: ------------------ Platforms ------------------
* Bukkit-Official(7.2.0-rc-01+81f978e)

[23:08:32 INFO]: ---------------- Capabilities ----------------
GAME_HOOKS: Bukkit-Official
CONFIGURATION: Bukkit-Official
USER_COMMANDS: Bukkit-Official
PERMISSIONS: Bukkit-Official
WORLDEDIT_CUI: Bukkit-Official
WORLD_EDITING: Bukkit-Official

Platform version:

[23:09:39 INFO]: This server is running Paper version git-Paper-230 (MC: 1.16.3) (Implementing API version 1.16.3-R0.1-SNAPSHOT)

Describe the bug

When issuing any WorldEdit command or setting positions with the wand item, the client who issued the command is kicked with the error `Internal Exception:

io.netty.handler.codec.DecoderException: com.google.gson.JonsParseException: Don't know how to turn {"component": { ... }} into a Component

To Reproduce

1. Install WorldEdit on PaperMC 1.16.3
2. Join server
3. Issue any WorldEdit command
4. The client is kicked.

Expected behavior

Client shouldn't be kicked with an error.

Screenshots

//wand

//brush sphere

//pos1

Additional Context

WorldEdit was working fine on my server when using WorldEdit 7.2.0 Beta 5, after upgrading to 7.2.0 RC1 the issue appeared. No error appears in the server console.

Server plugins:

[23:15:54 INFO]: Plugins (55): AngelChest, BlockLocker, BuycraftX, Chunkmaster, CommandPanels, ConsoleSpamFix, CoreProtect, DeathMessagesPrime, DiscordSRV, DragonDeathDrops*, DriveBackupV2*, EmojiChat, EmotePlugin3*, Essentials, EssentialsAntiBuild, EssentialsChat, EssentialsGeoIP, EssentialsProtect, EssentialsSpawn, ExtraContexts, FastLeafDecay, GameModeInventories, GSit, HiddenLorax, HoneyPot, IllegalStack, LimitPillagers, LuckPerms, MarriageMaster, Matrix, mcMMO, MessageAnnouncer, MoreMeat, OpenInv, Plan, PlayerHeads, ProtocolLib, PvPManager, SAML, SelectionVisualizer, ServerListPlus*, Shopkeepers, ShowItem, spark, StackMob, TimeControl, Vault, ViaBackwards, ViaVersion, VillagerModifications, VillagerOptimiser, WorldEdit, WorldGuard, WorldGuardExtraFlags, WorldResourcepacks

Client version:

• Minecraft 1.16.3
• Forge 34.1.0
• Client mods:

AppleSkin-mc1.16.2-forge-1.0.14.jar, ClientTweaks_1.16.3-5.2.0.jar, cloth-config-forge-4.1.0.jar, jei-1.16.3-7.5.0.43.jar, JustEnoughResources-1.16.3-0.12.0.100.jar, light-overlay-5.5.3.jar, MouseTweaks-2.13-mc1.16.2.jar, OptiFine_1.16.3_HD_U_G3.jar, ReAuth-1.16-Forge-3.9.2.jar, Xaeros_Minimap_20.25.0_Forge_1.16.3.jar, XaerosWorldMap_1.11.0_Forge_1.16.3.jar

[octylFractal]

Can you reproduce after restart? If not, we know this bug, but it's basically impossible to actually reproduce and figure out what's wrong, we've basically marked it as "unfixable".

[RalphORama]

Yup, a restart fixed this. Very strange.

[octylFractal]

Yup, it's a super strange bug that's gotten many reports but is seemingly impossible. Closing as this will likely be fixed when we move to adventure in #1480 anyways.