1. Click the Chrome menu on the browser toolbar.  (3 dots vertical)  

  2. Select Settings.
  3. Click Show advanced settings (scroll to bottom of the page).
  4. in the “Privacy and security” section, click the Content settings button (2nd from the bottom in privacy section).
  5. In the “Pop-ups and redirects” section, click on "Allow all sites to show pop-ups.” Should look like this once allowed: