Registration and Login pages mixed up
The correct handler doesn't handle login pages. When you run the monster job searching app the bot tries to handle the login page with RegistrationHandler.
Either validate / make sure that the RegistrationHandler can correctly handle login pages as well or make sure that the LoginHandler always handles login pages.
Think through how the a login handler should handle when a login screen has a registration button. Clicking the registration button should probably take precedence.