InfoPath Dev

I have a repeating table inside a repeating section.
I want to merge the data in one field and promote it in SharePoint Library.

I am using qrules to merge the field and delimit using "|". My formula:
DelimitedList /xpath=/my:myFields/my:PersonsSection/my:PersonSection/my:Persons/my:Person/my:Name /space=delimiter

But I am getting below error:
"DelimitedList/xpath" does not point to a valid location path of a field or group.

I have attached my form field structure. In my form "PersonSection" is a repeating section and "Person" is a repeating table.
Please help me. What I am doing wrong in my formula?

The error makes it looks like there is no space in between the command and the /xpath param. So, I suspect you are putting this in the formula editor in your rule builder. You should be able to just put this into the value field without using a formula, because you don't need to pass in any field values. But I think you'd want the following for your formula: DelimitedList /xpath=/my:myFields/my:PersonsSection/my:PersonSection/my:Persons/my:Person/my:Name /separator=|

Hi Hilary, Thanks for your response. I did exactly as you mentioned in your response.

But I am getting an error(screenshot attached) while submitting this InfoPath form to SharePoint Online Document Library.

Also, the Form compatibility is set to "Web Browser Form".

I want to save the data in repeating table which is inside a repeating section. Please help me.