Data source is set as Airtable and no record id is given

Generating documents from Airtable requires a valid Record ID to be passed so that DocsAutomator knows for which record you're trying to generate a document.

From Airtable Automation Scripts

Often the error happens when trying to trigger from Airtable automation scripts. You will receive an error on the right side of the script window:

In order to fix this, please check your input variables on the left side.

In the case above, the recId variable has not been defined yet under input variables. This is also shown by the red squiggly line under recId in the editor on the right in the screenshot.

Please select the record id under input variables and make sure to give recId spelled correctly as the name: