We are building a SSIS Package but receiving the “The Locale ID 9 is not installed on this system” error. We are using the SQL server 2017 Enterprise Edition and Visual Studio 2015 Community Edition with SSDT 2015 Edition.
Go to the Project Properties as shown below.
In the Configuration Properties check if the Target SQL version is set to correct version.
If still not working set the SQL Server to a lower version than your current version.