Tableau Server 2018.2 comes with a new web-based server configuration utility called Tableau Services Manager (TSM). Upgrading to this version requires special steps. Please see this article for instructions on what has changed to ensure your upgrade goes smoothly. If your install is hung up around either 12% or 76%, please see this article for resolution.
Release Notes for Tableau 9.3.1
If you use the Tableau Online Sync client from Tableau Desktop on Windows to refresh extracts on Tableau Online, please upgrade Tableau Desktop from 9.3.1 to 9.3.2. For more information, see the Release Notes for 9.3.2.
Note: Tableau Desktop customers in environments with Product Updates enabled will be prompted to upgrade a few days after a maintenance release is made available. For more information, see the Tableau Knowledge Base.