Hi @Alejandra Ornia,
Thank you for the screenshots and additional information!
Regarding your first question: When configuring the action, I cannot find the Confluence Space in the searcher, so I must put it manually
If you can’t find the “Space” you’re looking for in the dropdown, I suggest using the Space ID on your Confluence Cloud app and mapping that as a custom value. Here’s how: https://help.zapier.com/hc/en-us/articles/8496241696141-Add-custom-values-to-dropdown-menu-fields-in-Zaps#set-up-a-custom-value-0-0
Regarding your second and third question:
The action setup looks good, and I don’t see anything unusual so far. The error, however, says, “A page with this title already exists: A page already exists with the same TITLE in this space” I think Confluence Cloud doesn’t allow duplicate pages with the same title. That being said, could you please make a new test and ensure that the TITLE is different this time?
Hopefully, this helps! 😊