As some of you may have discovered, if you are using a mod in conjunction with Economics that contains a .DLL that is not up to date then you experience a bug where the tax sliders and policies don't unlock when you arrive at the appropriate era. One such mod conflict that causes this is when you are using YnAEMP DLL 43 civs. I discovered a work around for this.

1) uncheck YnAEMP DLL 43 civs in your mods selection screen
2) go to WHoward's Pick 'n Mix Mods website ( https://www.picknmixmods.com/mods/CivV/DLL/Various%20Mod%20Components%20-%2034%20Civs.html ) and download DLL - Various Mod Components - 34 Civs. WHoward's DLL contains bug fixes and quality of life components but nothing that alters gameplay in any major way. Should be compatible with most mods that don't contain a .DLL.
3) install it in your MODS folder
4) enable it in your mods selection screen. It IS compatible with YnAEMP DLL Leader fix for BNW (v 2). So keep that checked.
5) Go ahead and start it up. You should be good to go.