I am using tzwhere module to get the timezone based on coordinates. I recently found I can set forceTZ=True but when I do this, it still does not return a timezone.

My code is:

from tzwhere import tzwhere
tz = tzwhere.tzwhere(forceTZ=True)
tz.tzNameAt(18.45903590,-67.16367790)

However this still returns None. Am I doing something wrong?