auto-populating "apply to each" fields when trying to use dynamic content causes flow failure

[Anonymous]

Using Microsoft Lists as a data source, I am trying to generate a PowerFlow that sends an email 30 days prior to the due date to the owner.  

For my list I have the following 'table' structure: 

Title (type = single line text)	Description (type = multi-line text)	Due Date (type=date)	Owner (type = person or group)
Obj 1	This is a description	8/15/2021	[validated AD user]

Everything works fine if I specify a static email address in the "send an email v2" step.  If I try and pull the email address of the owner using content from the previous Get-items step, it throws me into a loop.  Here is a step-by-step depiction: 

Step 1: Select "Dynamic Content" and search for Owner.  Remember that the Owner column is a "people or groups" type column and validates the user upon entry into the list.  I select owner.

Step 2: In the next step, I've already selected "owner" from the drop-down.  The "Apply to each" pane shows up magically with the "select an output from previous steps" auto-populated as "value".

Step 3: I open up the "send email" pane and this is what's auto-populated.  If I try to save it with the "To:" field as the "owner" dynamic value, I get an error message, "Flow save failed with code 'OpenApiOperationParameterValidationFailed' and message 'Input parameter 'emailMessage' validation failed in workflow operation 'Send_an_email_(V2)': The parameter with value '"@items('Apply_to_each')['Owner']"' in path 'emailMessage/To' with type/format 'Array' is not convertibleto type/format 'String/email'.'.  Which means that there is no automatic conversion of the validated user to the email address.  So I change "Owner" to "Owner email" (see next step), which allows me to save it.

Step 4: Change the dynamic value to Owner Email, which allows me to save. 

Step 5: Notice that now there are TWO "Apply to each" steps (this happens automatically when I replace "owner" with "owner email" for the dynamic value.  Notice there was only one in the previous step.

Step 5: The test run fails with the following error messages: 

Any thoughts?  What am I doing that's so bone-headed here?  Thanks in advance.  

Al

[v-bofeng-msft · Accepted solution]

Hi @Anonymous :

Could you please tell me:

Does the Owner column allow multiple selections?

I assume the Owner column do not allow multiple selections.The flow should be:

Best Regards,

Bof

[Anonymous]

I actually did have the multiple selections enabled.  Thank you so much for the help!