I need help automating WorldEdit commands

Hi! I have a problem with some commands, let me explain:

I'm building a big cube, like an arena where players can fight using weapons, like CS:GO (using Quality Armory plugin), so before entering the arena, players must go through rooms that have 7 chests inside, varying from weapons, to armor and food. I need those chest to fill themselves every x minutes, because people are gonna be entering all day, so there always need to be stuff for them to take. I've tried using schematics with WorldEdit and it works great, //copy - /schem save - /schem load - //paste. The thing is I can't be running those commands all day, since I'm not online 24/7, also there are 10 rooms with 2 schematics per room, and I need them all to refresh at the same time.

I've tried using command blocks with redstone repeaters but WorldEdit commands don't work with them(does nothing), I've also tried using plugins that send commands from console every x minutes, but WorldEdit also doesn't work with console(does nothing). I've tried using a virtual player to run those commands and have the command scheduler run the virtual player, but again, it doesn't work(does nothing). Does anyone have a suggestion? The arena is complete, I only need the chests to refresh and that's it.

Here are the plugins I use on my server(1.13.2):
ActionHealth
Advanced-Portals
AdvancedCraftingTable
AutoMessager
ChatColor2
ChatFeelings
Clearlag
ClientStats
ConsoleScheduler
CoreProtect
CraftDisplay
GriefPrevention
HolographicDisplays
JustTPA
orebfuscator
PluginConstructorAPI
PrivateChests
ProtocolLib
QualityArmory
regionboard
RPGLoot
ServerRestorer
SetHomes
Shopkeepers
SkinsRestorer
Vault
VirtualPlayers
worldedit

Any additional info you need, please ask. I'm very new to running servers, been running this one for less than two weeks, so I'm still learning. Hope you guys can help me, thank you in advance.

 

I did, but I'd rather have the chest refill, because being limited with weapons and bullets every x minutes is part of the game, to economize them as much as possible, although I guess I could use infinite chests if there's no other way around