Npc portrait mods not working

Malice

Newcomer
I'm fairly new to stardew mods, have played with mods on several other games. Most of my mods are working it's just the portraits that aren't. I downloaded this one https://www.nexusmods.com/stardewvalley/mods/19589

Really love the look of these I just don't understand why they don't work and I don't have anything besides basic knowledge so I don't know how to fix it. Hoping someone here can help. Thank you.
 
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