I'm trying to update my mod, but when I check the files, most of it it's gone

So I tried updating a mod I created where I added many player icons but when I update the mod, and enter the game to see it, most of the files I put are gone, even though the names of the files are correct (I tested the player icons on my pc before and it was fine) there is nothing NSFW, it’s basically anime characters but I suppose the system is censoring the mod or something? how do I fix this?