Cannot connect to server - Unable to get Klocwork Server - Incompatible client version
From current
When you see this message, "Cannot connect to server: Unable to get project Klocwork Server at http(s)://<host>:<port>/<project>: Incompatible client version (<version>). Server version is <version>", it means that you need to install a version of the Klocwork User package that's compatible with the Klocwork Server version.
The above message displays for Klocwork Desktop, IDE plug-in and kwcheck users when your connected desktop project fails to synchronize with the server project. Synchronization problems are indicated with this icon: 
. Mousing over the icon displays the sync error message.
Contact your Klocwork administrator to find out where a compatible Klocwork User installer is available.
Uninstall your current Klocwork User version and then install the appropriate version.
You'll know Connected desktop and synchronization is working again when you see the 
Project is synchronized icon.