If you're seeing this error, it's likely that the Synergy client can't make a connection to the database. You can check this by testing the connection. If you need, reach out to your local IT team to help.
Within the Central Services install location, open the Web.config file.
Find the row starting <connectionStrings> and make note of the SQL server name set as the data source.
On the computer where your Synergy client is installed, click the start button.
Type Run, then enter ODBCAD32. This opens the ODBC data source administrator tool.
Click Add, then click SQL Server.
When prompted, enter the SQL server name as it appears in the config file.
When prompted, enter the database login details.
Under Change the default database, select the Synergy database name.
Click Finish, then click Test Data Source.
If a connection to the SQL server can't be made your computer with Synergy client installed, raise this with your location IT team.