Describe the bug:

After server restart all of shops disappeared, this means there is a sign, but no shops are detected there.
I can see a message in a console like on the attached pastebin in additional context.
Please help.

To Reproduce:

Steps to reproduce the behavior:

1. Install the newest version
2. Restart the server
3. All shops disappear

Expected behavior:

Shops should work like before the restart.

Paste link:

Execute command /qs paste, and you will get a link contains your server information, paste it under this text.
You must create a paste, except plugin completely won't work.
If you create failed, you should find a paste file under the plugins/QuickShop folder.

• https://pastebin.com/PHxC0dwT

Additional context:

Console log
https://pastebin.com/tBfXmUJv)

Other plugins:
Plugins (65): ActionHealth, AdvancedChests, AdvancedLogger*, AdvancedRegionMarket, AntiVPN, AntiWorldFly, ArmShopBridge, AsyncWorldEdit, AuthMe, BetterHeads, ChestSort, CommandNotifier, CommandPanels, ContainerPassthrough, CraftBook, DeathPenalties, dynmap, Dynmap-WorldGuard*, EasyCarts, Epidemic, Essentials, EssentialsChat, ExcellentEnchants, GSit, Harbor, HolographicDisplays, Images, Jobs, KeepChunks, LangUtils, LogBlock, LuckPerms, LWC, LWCTrust, MobArena, MyCommand, NBTAPI, NexEngine, NoElytra*, OpenInv, OreAnnouncer, PetMaster, PL-Hide-Pro, PlaceholderAPI, Plan, PortalFix*, ProtocolLib, PvPManager, QuickShop, QuickShopDynmap, QuickShopList, RegionRaid, SkinsRestorer, Spartan, StackMob, SuperVanish, TAB, TitleManager, TreeAssist, Vault, Vehicles, VehiclesFlags, WorldEdit, WorldGuard, WorldGuardExtraFlags

You can try force load this ItemStack by our hacked ItemStack read util(shop.force-load-downgrade-items), but beware, the data may damaged if you load on this lower Minecraft server version, Please backup your world and database before enable!

Please enable force-load-downgrade-items in config.yml, you are loading shops saved in the newer Minecraft version, causing shop load failed.