yeah, I'm getting the same message.
▼Create Boundary
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▼Offset Path
Offset: 0 pt
Miter Limit: 4
Line Join: Miter
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▼Swatches
Apply Swatch: [None]
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▼Swatches
Apply Swatch: CMYK Red
I saw another message were others are having probs, so it's gotta be a system thing.
I'm not seeing "swap" and I think that's the key thing.
Make sure you have no stroke to begin with. Do your offset, apply the color to the fill of the offset and then swap your fill for you stroke.
That's the only think that I can think of. In my world (embroidery design), I keep the fill there and don't need a stroke, so this isn't an issue for me.