Colors are not displayed

[Lijiuyin]

Thanks for making vaspvis available, it is indeed very useful.
I ran the code and the result graph is not shown in color, mostly occupied by black, It does not match the example given.
What needs to change to plot this correctly?
from vaspvis import standard
standard.band_orbitals(
folder='./BAND',
orbitals=[0, 1, 2, 3, 4, 5, 6, 7, 8],
)
!