JJ Slime

i downloaded everything correctly... or at least i think that I did? LST works perfectly fine, and i do hear the beeps when launching the game, but none of my mods show up after launching the game. I installed everything to the game root file, so i dont think that thats the issue. Whenever I try to open up the LML UI i get a notification that modmanager.core.dll isnt in the game files, even though when I look its there? I dont know what im doing wrong pls help