Describe the bug
I encountered this error that stopped the functioning of the objects that used the worldguard regions.
The following message continued to be printed in the console and in a short time the logs came to occupy almost 1gb.
Entering the regions the items were not changed.

To Reproduce
Unfortunately I have no way to describe how to reproduce the malfunction because after restarting the server I was no longer able to find the problem even redoing everything as before.
However, it seemed right to tell you because if it happens again when I do not have the console in sight it would bring me many problems.
All I can do is attach my plugin configuration.

Pastebin
Console error: https://pastebin.com/9ihKkh3G (this appeared at the same time that the player joined)

Please complete the following information:

• Resource Version and Build Number: v5.2.1-RELEASE-b678
• PaperSpigot-1.8.8

Additional context
config.yml: https://pastebin.com/UhpGNdGP
items.yml: https://pastebin.com/VnfgHTLZ

This bug has been officially fixed in the release of ItemJoin v5.2.2.
You can grab it here; https://www.spigotmc.org/resources/itemjoin.12661/download?version=403809

Please read the changelog as the documentation has not been updated yet;
https://github.com/RockinChaos/ItemJoin/wiki/Recent-Changes

Sorry about this issue!
So there have been quite a few notable changes in the snapshots for WorldGuard regions so I would suggest updating and checking if the issue still occurs.

Link; https://ci.craftationgaming.com/job/ItemJoin/692/
Remember to remove your old ItemJoin.jar file

I ran into the same issue using build #688 I've updated to the latest version recently( #704), so I'll keep you posted!

I ran into the same issue using build #688 I've updated to the latest version recently( #704), so I'll keep you posted!

I would highly suggest updating to the latest dev build I pushed out today as it has been reported to 100% resolve the issue with the finalized changes.

Link; https://ci.craftationgaming.com/job/ItemJoin/706/
Remember to remove your old ItemJoin.jar file