Hey.
What's your version of the game?
i am having the exact same issue, and my game version is one of the game versions supported by this mod. i’ve been trying to get this mod to work for weeks, can you tell me what the problem is?? everything i’m doing is right, it just won’t show up in game, but it does in my mods on the opening screen. i also made sure that the mod is no more than ONE folder deep in the mods folder, i put the “wonderfulwhimsmod” folder directly into my mods folder. like i said i’m doing everything right and it still doesn’t work. can you please help me with whatever else i can do to fix this?
You'd know if you made a backup copy of the folder.
If the file path looks like this Documents/Electronic Arts/The Sims 4/Mods then you're in a correct place.
If it looks different then it's either a backup copy you've made, or possibly you're working with a cloud copy (iCloud/OneDrive/Google Drive) instead of a local folder on your PC, and not actually making any changes, which is a common mistake.