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"Error: unkown filtered scanline" in Fitbit Studio

My build is failing with this error. What does this mean?

 

Internal error during build. Guru meditation: Error: unkown filtered scanline
Build failed.
Build failed.

 

1. That's a type in the console log. Should be "unknown".

2. This occurred after I shrunk my PNGs using ImageOptim.

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Thanks for the feedback!

 

Can you provide the image files which didn't work and we'll get this fixed in a future update.

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I am running on the same issue with the png image exported from this site

https://www.flaticon.com/

 

Link to an image that cause the build error

play.png.zip

 

The error looks related to the image palette, the PNG has to be a full RGB image and not an indexed one. I guess that the image optimization is reducing the color space.

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