GADoom - Weapon Packs not working Thread

As I understand, most of time I only need to drag and drop the mods into GZDoom and have a WAD present (Doom or Doom 2) in order to launch it. This has worked with Brutal Doom (various versions) the metal soundtrack remixes, and a custom HUD. However, every time I go to use a weapon pack, they either have an error pop up that prevents the game from launching or they simply don't seem to take effect. Is there a step I'm missing?

Possibly, the weapon pack may be placed in the wrong spot or something along those lines. What error are you getting?