NC16: This directory is unavailable, please check the logs or contact the administrator

Anyone get this message after upgrading to NC16? The folder in question was a shared folder and I also received this message on the admin account:

“Some of your link shares have been removed. Due to a security bug we had to remove some of your link shares.”

I was able to restore the files from backup and create a new folder, but the old folder remains and is unusable/unremovable. Any ideas here?