Weird Error: “Invalid Reference in Filter ‘0-0’: Make.com”

I love Make.com. It is a tremendous tool and I’m so happy when I find a time to use it.

I was trying to start a scenario the other day and it kept failing. The error was weird. It said:

Invalid Reference in Filter ‘0-0’ on link ‘Test Not Empty String’

The thing was, I only had ONE item in my scenario. There were no filters, and no errors I could find on the screen.

It wasn’t until this morning that it connected. Maybe I hadn’t used this item as the first element. Maybe something else was there previously that I had deleted! Sure enough, that was the issue. The filter wasn’t showing because it was the only item, but it was still there.

Here is how I fixed it:


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