Attempting to create an Adobe Sign flow and add optional email addresses to the flow, the flow fails when those fields are blank. Otherwise the flow works fine with just one email address.
Ideally I want to send potential agreements to multiple people, it would also be nice to work out a way to change if those people are certified recipients or additional signee's.
Here is the flow and errors:
1) Document is uploaded to library and then flow manually started - navigate to emails

2) The flow itself is here with the options highlighted.

3) these fields ask for Email1 or Email2 but the flow then fails if those fields are not entered by the user.

The error is -
'Create_an_agreement_from_an_uploaded_document_and_send_for_signature' inputs at line '1' and column '2088': 'The template language expression 'triggerBody()['email_2']' cannot be evaluated because property 'email_2' doesn't exist, available properties are 'entity, email'. Please see https://aka.ms/logicexpressions for usage details.'.
I have looked at Set Variable option but don't see an option to insert Email1 or Email2 as variables.