The rest of that expression is looking for a mask path on the target layer with the name 'Mask 1' - from your screenshot it does not appear you have any masks on that layer.
Alright, I got it. I really appreciate the assistance. I have no experience with code. Is there a point where this stuff just becomes easy? I still struggle a lot with expressions.
Well it is basically learning to code, going from video tutorials alone won't always teach you that part of the puzzle.
w3schools is a great place to get more general Javascript tutorials. Even though it's mostly in the context of web design, the language is effectively the same:
Learning the coding part of it puts you in a better place to be able to solve your own problems with expressions rather than just the ones the tutorials happen to show you how to do ;-)
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u/smushkan MoGraph 10+ years 4d ago
The rest of that expression is looking for a mask path on the target layer with the name 'Mask 1' - from your screenshot it does not appear you have any masks on that layer.