You have to have your own boxes, the plugin does not spawn them 

setting it to 40k and 60k items to spawn is way too many. Use a realistic number. You run the risk of crashing the server doing that

are these bases from Fortify? Fortify is known to not always save bases properly. Save them again.

boxes must be a small wooden box or large wooden box

you also need to update the plugin? I am seeing a config option that doesn't exist anymore...

"Release Lock On Treasure When First Attacker Is X Meters Away": 300.0,

this shouldn't even be in the config. your config might be corrupted.

Thank you for the response back.  I found a working combination, I set tue plugin to remove all loot in boxes and spawned in loot table WITH realistic spawn amount.  So far plugin works like a charm and have a huge gathering because of it.  

nice gj