State dropdown empty on form with Drupal webform integration
Usually when a javascript element fails to work on your page, it's caused by a general javascript failure on your website. This can be caused by incompatible plugins or themes, etc. So the problem may have nothing to do with the state/province field or webform-civicrm; if Javascript has crashed, then it can't run. To narrow down the problem, open up the console in your webbrowser (F12) and look for any error messages. If the error message contains the name of a plugin, try disabling it. Or take a screenshot of the error and add it to your question.