I don't see the Dropbox icon in my taskbar or menu bar — did it disappear?
The Dropbox icon will only appear in your taskbar or menu bar if the Dropbox desktop app is downloaded to your computer and running. Occasionally, the Dropbox icon will seem to "disappear," because the desktop app is inactive on your computer.
To resolve this, relaunch the application or download (or re-download) the Dropbox desktop app and log in to your Dropbox account when prompted.
The Dropbox app for Linux was recently updated. Some Linux users may need to meet additional requirements or download additional libraries to continue using the app in the same way as before. If you’re having issues seeing the icon in your taskbar on Linux, check you’re running the latest version of the app, review the latest system requirements, then update your computer if necessary.