crash server, for the command gmask ? (with log)

[nyvlunx]

[REQUIRED] FastAsyncWorldEdit Configuration Files

/fawe debugpaste:

https://athion.net/ISPaster/paste/view/fa07363e8b954e1ebf06165aea5c1b39

Required Information

• FAWE Version Number (/version FastAsyncWorldEdit): FastAsyncWorldEdit version 1.16-435;49052d7
• Spigot/Paper Version Number (/version): Paper version git-Paper-262 (MC: 1.16.4) (Implementing API version 1.16.4-R0.1-SNAPSHOT)
• Minecraft Version: 1.16.4

Describe the bug

The bug is a server crash maybe from the command gmask from the log ?

Paste from the error : https://pastebin.com/UVCpEuUi

Plugins being used on the server

ArmorStandEditor, Autorank, BKCommonLib, Builders-Utilities, BungeeTabListPlus, Citizens, CraftingStore, Denizen, Depenizen, DiscordSRV, dynmap, Essentials, EssentialsAntiBuild, EssentialsChat, EssentialsProtect, EssentialsSpawn, (WorldEdit)FastAsyncWorldEdit, goBrush, goPaint, HeadDatabase, HolographicDisplays, IPWhitelist*, LightCleaner, LuckPerms, Multiverse-Core, PlaceholderAPI, Plan, PlotSquared, ProtocolLib, spark, Vault, ViaBackwards, ViaVersion, VoxelSniper, WorldBorder, WorldGuard

Checklist:

• [x] I included all information required in the sections above
• [x] I made sure there are no duplicates of this report (Use Search)
• [x] I made sure I am using an up-to-date version of FastAsyncWorldEdit for 1.16.4
• [x] I made sure the bug/error is not caused by any other plugin

[dordsor21]

This is gopaint using FAWE from the main thread. Not gmask or FAWE.