When I use bones to create variable fonts, it always shows “The character shapes are incompatible; cannot convert to compatible TrueType curves”, but when I click on the characters, it shows no error. Currently, the only solution is to expand the outline and align each point. However, compared to drawing the outline from the start, the expanded outline is too complex, especially for characters with many strokes, making it difficult to align two masters. How can this be solved?