Hi all,
In my case, I was working in Visual Studio 2019 and had only installed the SSIS Azure Feature Pack for SQL Server 2019 which is the only version I am running locally. When an SSIS project switched recently to SQL Server 2017 compatibility, I had to go out and download/install the SSIS Azure Feature Pack for SQL Server 2017. Hope this helps someone.
Best regards,
Darren