Launcher won't access Skyrim directory

[SpaceWolf727]

I cannot launch the game due to this error:

"[2022-07-03 00:37:03.289 E] failed to open directory '??\Z:\media\USERNAME\HDD\SteamLibrary\steamapps\common\Skyrim Special Edition\data': 0xc0000034"

I have all the paths set correctly, and I own the directly (naturally) but it keeps acting like it doesnt exist. Even LOOT can access it to sort mods, but as soon as I start SKSE it borks.

Also, I did notice the base skyrim masters (Skyrim.esm, etc) aren't detected, but the DLC are.

Anyone have any ideas? I can't find anything anywhere