I’ve just upgraded to the latest Bitwarden Windows client 2023.12.0 and I thought I’d LOST all my folders of which I have many… fortunately, they don’t seem to have been deleted from the vault - they’re still visible in the browser extension, on the web and on the mobile app. If you try and edit an entry, the folder is also blank and the drop down is empty.
My laptop is still running 2023.9.3 and that’s okay.