At a minimum, Forge version 1.15.2 - 31.2.22 is required for this mod.
Release - 184.108.40.206
Fixes an issue with the extra drops functionality where the additional drops were being generated when using tools with silk touch.
Release - 220.127.116.11
This is the first release for 1.15.2; there are bound to be bugs, please let me know if you find any and I will fix as soon as I can.