ERROR:To run a SSIS package outside of SQL Server Data Tools you must install Standard Edition of Integration Services or higher

I'm running the latest  SSDT
Microsoft Visual Studio 2015 Shell (Integrated)
Version 14.0.23107.0 D14REL
Microsoft .NET Framework
Version 4.6.01055
Installed Version: IDE Standard
Microsoft Visual Studio Tools for Applications 2015 00322-10000-00000-AA722
Microsoft Visual Studio Tools for Applications 2015
Visual Basic 2015 00322-10000-00000-AA722
Microsoft Visual Basic 2015
Visual C# 2015 00322-10000-00000-AA722
Microsoft Visual C# 2015
SQL Server Analysis Services 13.0.1605.88
Microsoft SQL Server Analysis Services Designer
Version 13.0.1605.88
SQL Server Data Tools 14.0.60629.0
Microsoft SQL Server Data Tools
SQL Server Integration Services
Microsoft SQL Server Integration Services Designer
Version 13.0.1601.5
SQL Server Reporting Services 13.0.1605.88
Microsoft SQL Server Reporting Services Designers
Version 13.0.1605.88

I created a SSIS task that has targetserverversion set to SQL Server 2016
I created a bat file that targets: C:\Program Files (x86)\Microsoft SQL Server\130\DTS\Binn\DTExec.exe

When I run the bat file, the task runs the first 6 control flow items which are SQL Tasks. The seventh control flow item is a script task which throws the following error:

To run a SSIS package outside of SQL Server Data Tools you must install Standard Edition of Integration Services or higher

I'm not sure why it is failing with this error.