I have an existing form that was probably created with Composer 4.0 or so. Now I am on a later version of composer.
I want to use put the confirmation page IN the form (instead of in TM).
I have edited the form to "Enable In Form Transaction Management" and I see the confirmation in the wire frame. However whenever I submit the form (In TM or just in preview mode), I get the following error:
Missing URL for service 'null'. Check that the form is being rendered using Transaction Manager.
How do I fix this? Do I need to delete something and have composer recreate it?
Resolved by support team.