How to merge content of bundles from multiple operations

What are you trying to achieve?

Hi,
I’m pulling multiple emails from gmail - those are returned in a single bundle, then do processing on them in Open AI and want to combine and send results in a single email.
The issue is after the Open AI module results are returned in multiple operations (as many operations as number of emails - you can see it on the screenshot).
E.g. OpenAI will return 3 operations, each containing a bundle.
How do I merge those 3 bundles from 3 different operations into a single text that I can send in a single email?
The way it works right now, it’s sending 3 emails…

The source module of the text aggregator is set to OpenAI.

Steps taken so far

I tried using both text and array aggregators, but neither worked for me.

Screenshots: scenario setup, module configuration, errors