Convert multiple bundle from agreagte into a string

How To
1

Folks, my idea was to collect from a Googel doc email addresses, look the up in make, get the Page ID and get the summ of all these Page IDs into a string so I can run with an Notion Update a DB node the realtion to all of these peopl.
So I started with a Notion lokup of the the object I wanna add the Link list, Downloaded the Google file and passed it to a CSV node to get the emails only, packed the csv rsult with an iterator node. With the result pasing to a Notion Search and lookup each page_id which match the email addresses, went to a array aggregator and try to update now a Notion DB update the field with {{29.array}}. How can I get this fixed
This node rises an error with:

RuntimeError

[400] body failed validation: body.properties.Teilnehmer-Link.relation[0].id should be a string, instead was {"id":null}.

3

Welcome to the Make community!

To do this, you can try using the Tools “Text aggregator” module —

Aggregates multiple strings into one text.

For more information, see https://www.make.com/en/integrations/util, and https://www.make.com/en/help/app/util in the help centre.

Hope this helps! Let me know if there are any further questions or issues.

— @samliew

P.S.: Investing some effort into the Make Academy will save you lots of time and frustration using Make.