The game can't process that many mods at startup (and with that many, you almost certainly have issues with duplicates, at a minimum). Definitely leave "show at startup" unchecked once you get this working again.
Make a fresh user folder and test with just a single newly downloaded piece of CC: https://sims4.crinrict.com/eng/2014/09/resetting-the-game-to-factory-settings-without-reinstalling/
I just tried your suggestion; it unfortunately still did not work 😔 I have included screenshots of the Mods screen and the new folders and tester CC (just downloaded for testing purposes, it was published today on TSR so it is nice and fresh! 😊)
I have had this file going for years, I just am so lost on why all of the sudden this would happen 😭
I would like to note though, my game will read script mod files. I had tested it with MCCC and it populated on the Mods list (not shown here because it wasn't done in this test), but CC still did not show.
