Issue with sunburst plot

[drhmoosavi]

Hi
Thank you for very interesting package.
I am trying to make a sunburst plot based from the text file below that I have modified it manually to be similar to the required structure. But i cannot figure out what am i doing wrong since it does not print anything when i run sunburst().
There are columns L1 to L3, which are level 1 to 3, respectively. And the L4 contains variables for coloring.

MMdata.txt

Appreciated if you could help me to understand where the problem is.
Best