im trying to rig my model but i get this error, im new to blender i need help
from the picture it seems some required leg bone is missing(deleted) or unpainted. I can't spot the heel.002.L (and .R) bone. This could be the problem but I'm just guessing since there are no information. Since the thread is not updated since more than one month and the error it's not reproducible I am closing this as invalid.
I am also point one more time that before reporting bugs users should have the good practice to read the wikis (that people take time to write) and check if the issue is caused by misuse of the tool rather than a bug.
rigify wiki here