First, you can just locate the link to this website at the top of your screen, below the tabs you have opened in your browser. The image above this text is the link to the login page. Notice the lock icon at the link's left side.
<-- Click the lock icon, and a GUI will pop up
Be sure to navigate to 'Permissions for this site'->' Pop-ups and redirects'-> [select option 'Allow']
. Refresh the page after following all the steps. that's it!