Most likely the Devart.* assemblies from different versions are mixed up in your production.
Please reinstall your SSIS Data Flow Components for PostgreSQL in your deployment environment this way:
1. Uninstall SSIS Data Flow Components for PostgreSQL.
2. Use some file manager (like
https://x-diesel.com/) to remove these files/folders if any:
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"C:\Program Files\Microsoft SQL Server\110\DTS\Connections\Devart.SSIS.PostgreSql.110.dll"
"C:\Program Files\Microsoft SQL Server\110\DTS\PipelineComponents\Devart.SSIS.PostgreSql.110.dll"
"C:\Program Files\Microsoft SQL Server\120\DTS\Connections\Devart.SSIS.PostgreSql.120.dll"
"C:\Program Files\Microsoft SQL Server\120\DTS\PipelineComponents\Devart.SSIS.PostgreSql.120.dll"
"C:\Program Files\Microsoft SQL Server\130\DTS\Connections\Devart.SSIS.PostgreSql.130.dll"
"C:\Program Files\Microsoft SQL Server\130\DTS\PipelineComponents\Devart.SSIS.PostgreSql.130.dll"
"C:\Program Files\Microsoft SQL Server\140\DTS\Connections\Devart.SSIS.PostgreSql.140.dll"
"C:\Program Files\Microsoft SQL Server\140\DTS\PipelineComponents\Devart.SSIS.PostgreSql.140.dll"
"C:\Program Files (x86)\Microsoft SQL Server\110\DTS\Connections\Devart.SSIS.PostgreSql.110.dll"
"C:\Program Files (x86)\Microsoft SQL Server\110\DTS\PipelineComponents\Devart.SSIS.PostgreSql.110.dll"
"C:\Program Files (x86)\Microsoft SQL Server\120\DTS\Connections\Devart.SSIS.PostgreSql.120.dll"
"C:\Program Files (x86)\Microsoft SQL Server\120\DTS\PipelineComponents\Devart.SSIS.PostgreSql.120.dll"
"C:\Program Files (x86)\Microsoft SQL Server\130\DTS\Connections\Devart.SSIS.PostgreSql.130.dll"
"C:\Program Files (x86)\Microsoft SQL Server\130\DTS\PipelineComponents\Devart.SSIS.PostgreSql.130.dll"
"C:\Program Files (x86)\Microsoft SQL Server\140\DTS\Connections\Devart.SSIS.PostgreSql.140.dll"
"C:\Program Files (x86)\Microsoft SQL Server\140\DTS\PipelineComponents\Devart.SSIS.PostgreSql.140.dll"
"C:\Windows\assembly\GAC_MSIL\Devart.Data\" (folder)
"C:\Windows\assembly\GAC_MSIL\Devart.Data.PostgreSql\" (folder)
"C:\Windows\assembly\GAC_MSIL\Devart.SSIS.PostgreSql\" (folder)
"C:\Windows\Microsoft.NET\assembly\GAC_MSIL\Devart.SSIS.PostgreSql.110\" (folder)
"C:\Windows\Microsoft.NET\assembly\GAC_MSIL\Devart.SSIS.PostgreSql.120\" (folder)
"C:\Windows\Microsoft.NET\assembly\GAC_MSIL\Devart.SSIS.PostgreSql.130\" (folder)
"C:\Windows\Microsoft.NET\assembly\GAC_MSIL\Devart.SSIS.PostgreSql.140\" (folder)
=================================================
3. Install SSIS Data Flow Components for PostgreSQL v1.7.672.
Does this help?