Same error here... agricraft stuff...
you mean delete the config on " minecraft\config\agricraft" ?
No, it seems to be the folder minecraft/config/BlockProperties/Agricraft.
As far as I understand, this folder contains configs for the original Agricraft resource crops (Aurigold, Ferranium) etc. which are disabled in this pack.
However, is it safe to just delete the whole folder? I don't want to corrupt my world.