Red circle appears for nowhere

Skärmavbild 2024-07-03 kl. 12.57.15

This red circle is causing an error when exporting the font. The error message is “Some glyphs are not compatible and will have no outlines”. It would be easy to solve if I could remove this red circle, I guess.

When Glyphs counts the path, it includes this generic background-ish red circle and therefore the glyphs are not compatible.

Can you run Path > Tidy up paths?

Hi Georg. Excellent. That removed the guideline. Thank you.