Have you tried these step-by-step instructions? http://www.howtogeek.com/239682/how-to-watch-hulu-on-ubuntu-and-other-linux-distributions/ I know how Hulu works on Linux has changed, so I hope that is the current method to get it to work correctly.
What version Ubuntu? Is it saying to install HAL? Are you using Firefox? Chrome on Mint 18 which is Ubuntu 16.04 will support Hulu out of the box. https://www.google.com/chrome/browser/desktop/index.html# sudo dpkg -i google-chrome-stable_current_amd64.deb
