but folders exist. What did I screwed? How to fix these!!!!!!!!!!!!!!!!!!!!!!!!!11111!!!

if you have backups of the neighborhoods, you might replace the folders with those.
if not, you might replace the pre-made neighborhoods with their Program Files equivalents or with their disc equivalents. or with downloadable equivalents; not sure where to download.

This is something that tends to happen when neighborhoods are hopelessly corrupted - the folders are still there, but the game can't access their contents.

To test whether this is the case, take the folders out and replace with a backup. If the backup loads, use it - the newer one is probably corrupted. If the backup doesn't load, either, something else is going on.

This happened to all your neighborhoods at once? It seems unlikely they'd all corrupt at the same time unless there was some disastrous event in your system, in which case I'd be anxiously checking files in my other programs.