Modding Help How to create loot/reward bags with essence

I am trying to create a new reward bag different from the vanilla one that would give the player a random amount of essence.I want to add this to my other mod (Figurines table) because it seems to OP to just set a fixed amount of essence for a boss action figure...
What i think i need:
Folders

1. items(active(the loot bag part that i dont know how to do)
2. treasure(treasurepool.treasurepools)

I tried copying the fracking universe one and change it but if someone knows the code i would happily take it
Should i say how big of a n00b i am ( with lua code of course)?

Hopefully the attachment works.

 

what doesnt work with it?

 

Sorry for being late:
The problem is that the items don't spawn after i click the essence bag so i just get an empty reward....

 

Log in, Use one, post your error log. that will most likely have the issues in it