Hey @DonaldFrancis - sorry to hear about this.
A red circle with a white “X” means that your file or folder can’t update or sync. If you just attempted to add this file or folder to your Dropbox account, it may mean that it can’t be added.
In that case, you can start by taking a look at this Help Center article.
If that doesn't help, please let me know the desktop app's exact status and version as shown in your menu bar/system tray along with your computer's OS version.
In any case, please keep me posted, Donald.