Please be advised that this is the entire crash message received. There was no further information for me to add. All I've added this time is the list of the plugins being shut down after the server thread dump.

[20:30:11] [Spigot Watchdog Thread/ERROR]: ------------------------------
[20:30:11] [Spigot Watchdog Thread/ERROR]: The server has stopped responding! This is (probably) not a Spigot bug.
[20:30:11] [Spigot Watchdog Thread/ERROR]: If you see a plugin in the Server thread dump below, then please report it to that author
[20:30:11] [Spigot Watchdog Thread/ERROR]: Especially if it looks like HTTP or MySQL operations are occurring
[20:30:11] [Spigot Watchdog Thread/ERROR]: If you see a world save or edit, then it means you did far more than your server can handle at once
[20:30:11] [Spigot Watchdog Thread/ERROR]: If this is the case, consider increasing timeout-time in spigot.yml but note that this will replace the crash with LARGE lag spikes
[20:30:11] [Spigot Watchdog Thread/ERROR]: If you are unsure or still think this is a Spigot bug, please report to https://www.spigotmc.org/
[20:30:11] [Spigot Watchdog Thread/ERROR]: Be sure to include ALL relevant console errors and Minecraft crash reports
[20:30:11] [Spigot Watchdog Thread/ERROR]: Spigot version: 3009-Spigot-73fb609-d97d918 (MC: 1.16.5)
[20:30:11] [Spigot Watchdog Thread/ERROR]: ------------------------------
[20:30:11] [Spigot Watchdog Thread/ERROR]: Server thread dump (Look for plugins here before reporting to Spigot!):
[20:30:11] [Spigot Watchdog Thread/ERROR]: ------------------------------
[20:30:11] [Spigot Watchdog Thread/ERROR]: Current Thread: Server thread
[20:30:11] [Spigot Watchdog Thread/ERROR]: PID: 30 | Suspended: false | Native: false | State: WAITING
[20:30:11] [Spigot Watchdog Thread/ERROR]: Stack:
[20:30:11] [Spigot Watchdog Thread/ERROR]: sun.misc.Unsafe.park(Native Method)
[20:30:11] [Spigot Watchdog Thread/ERROR]: java.util.concurrent.locks.LockSupport.park(Unknown Source)
[20:30:11] [Spigot Watchdog Thread/ERROR]: com.google.common.util.concurrent.AbstractFuture.get(AbstractFuture.java:471)
[20:30:11] [Spigot Watchdog Thread/ERROR]: com.google.common.util.concurrent.AbstractFuture$TrustedFuture.get(AbstractFuture.java:78)
[20:30:12] [Spigot Watchdog Thread/ERROR]: sun.nio.ch.WindowsSelectorImpl.doSelect(Unknown Source)
[20:30:12] [Spigot Watchdog Thread/ERROR]: sun.nio.ch.SelectorImpl.lockAndDoSelect(Unknown Source)
[20:30:12] [Spigot Watchdog Thread/ERROR]: sun.nio.ch.SelectorImpl.select(Unknown Source)
[20:30:12] [Spigot Watchdog Thread/ERROR]: io.netty.channel.nio.SelectedSelectionKeySetSelector.select(SelectedSelectionKeySetSelector.java:62)
[20:30:12] [Spigot Watchdog Thread/ERROR]: Stack:
[20:30:12] [Spigot Watchdog Thread/ERROR]: java.lang.Object.wait(Native Method)
[20:30:12] [Spigot Watchdog Thread/ERROR]: java.lang.Object.wait(Unknown Source)
[20:30:12] [Spigot Watchdog Thread/ERROR]: java.lang.ref.Reference.tryHandlePending(Unknown Source)
[20:30:12] [Spigot Watchdog Thread/ERROR]: java.lang.ref.Reference$ReferenceHandler.run(Unknown Source)
[20:30:12] [Spigot Watchdog Thread/ERROR]: ------------------------------
[20:30:12] [Spigot Watchdog Thread/INFO]: Startup script './start.sh' does not exist! Stopping server.
[20:30:12] [Spigot Watchdog Thread/INFO]: Stopping server
[20:30:12] [Spigot Watchdog Thread/INFO]: [BestTools] Disabling BestTools v1.11.1
[20:30:12] [Spigot Watchdog Thread/INFO]: [AngelChest] Disabling AngelChest v2.22.1
[20:30:12] [Spigot Watchdog Thread/INFO]: [WildStacker] Disabling WildStacker v3.5.1
[20:30:12] [Spigot Watchdog Thread/INFO]: [WildStacker] Cancelling tasks...
[20:30:12] [Spigot Watchdog Thread/INFO]: [WildStacker] Shutting down stacking service...
[20:30:12] [Spigot Watchdog Thread/INFO]: [WildStacker] Performing entity&items save
[20:30:12] [Spigot Watchdog Thread/INFO]: Shutting down database executor
[20:30:12] [Spigot Watchdog Thread/INFO]: [WildStacker] Clearing database...
[20:30:12] [Spigot Watchdog Thread/INFO]: [WildStacker] Stopping executor...
[20:30:12] [Spigot Watchdog Thread/INFO]: [ProtocolLib] Disabling ProtocolLib v4.6.0
[20:30:12] [Spigot Watchdog Thread/INFO]: [ChestSort] Disabling ChestSort v9.3.0
[20:30:12] [Spigot Watchdog Thread/INFO]: [mineOres] Disabling mineOres v1.2
[20:30:12] [Spigot Watchdog Thread/INFO]: [Vault] Disabling Vault v1.7.3-b131
[20:30:12] [Spigot Watchdog Thread/INFO]: [NetherEnableWater] Disabling NetherEnableWater v1.0
[20:30:12] [Spigot Watchdog Thread/INFO]: [EnhancedEnchants] Disabling EnhancedEnchants v1.2.3
[20:30:12] [Spigot Watchdog Thread/INFO]: [EnhancedEnchants] made by Kars
[20:30:12] [Spigot Watchdog Thread/INFO]: [CustomTime] Disabling CustomTime v2.0
[20:30:12] [Spigot Watchdog Thread/INFO]: [ArmoredElytra] Disabling ArmoredElytra v2.4.14
[20:30:12] [Spigot Watchdog Thread/INFO]: [Drop2Inventory] Disabling Drop2Inventory v4.9.3
[20:30:12] [Spigot Watchdog Thread/INFO]: [MobTools] Disabling MobTools v1.1
[20:30:12] [Spigot Watchdog Thread/INFO]: [Coordinates] Disabling Coordinates v2.1
[20:30:12] [Spigot Watchdog Thread/INFO]: [ChopChop] Disabling ChopChop v0.1.0
[20:30:12] [Spigot Watchdog Thread/INFO]: [Cartographer2] Disabling Cartographer2 v2.14.12
[20:30:12] [Spigot Watchdog Thread/INFO]: [Cartographer2] Disabling modules...
[20:30:12] [Spigot Watchdog Thread/INFO]: [Cartographer2] [ModuleManager] Disabling VanillaPlus v1.0.3 by BananaPuncher714
[20:30:12] [Spigot Watchdog Thread/INFO]: [Cartographer2] [ModuleManager] Unloading VanillaPlus
[20:30:12] [Spigot Watchdog Thread/INFO]: [Cartographer2] [ModuleManager] Unloading WGImage
[20:30:12] [Spigot Watchdog Thread/INFO]: [Cartographer2] Saving map data. This may take a while...
[20:30:12] [Spigot Watchdog Thread/INFO]: [Cartographer2] Saving map data complete!
[20:30:12] [Spigot Watchdog Thread/INFO]: [Cartographer2] Saving player data...
[20:30:12] [Spigot Watchdog Thread/INFO]: [Cartographer2] Saving player data complete!
[20:30:12] [Spigot Watchdog Thread/INFO]: Saving players

If you believe this to have been caused by something other than Spigot, please advise accordingly.

Thank you in advance for your assistance and understanding