Lines overlaps turn white

Some of the lines in my character overlap. I have searched through the forum and found that answer Nonetheless, the white colour in the overlapping zones is still present. What do I do?

Just in case. what I have already tried:

  1. Filter → Remove Overlap;
  2. Filter → Remove Overlap + Paths → Correct Path Direction;
  3. Correct Path Direction

Correct direction first, then remove overlap.
Check for duplicate paths if that does not help.

If the Correct path direction doesn’t work, you might need to check the path direction for each path manually. It has to be counter clock wise. You can there should be always one node that points in the direction of the path. Select one node, right click and do “Reverse selected paths”.