In my experience, this error happens when:
- you didn’t map the page ID from the previous module correctly
- you mapped the page ID from the previous module correctly but that module didn’t output any result (only possible with “search object” modules).
In your case, the error seems to be caused by option #1 because your first module had 1 bundle as far as I can see from the screenshot. So, you may check the page ID that you mapped in the second module in your scenario, as that may be the source of the error.