Hi Idea,
Just letting you know I tried your suggestion and it gave me the same error message – invalid argument.
I’ve reverted back to an old way of selecting members as I need to deploy the campaign on Monday, however if you could please look again at what is causing this error that would be great.
As mentioned I’ve used this same process box in many campaigns in the past without error, now suddenly I can’t use it in any of them.
Cheers,