If you are not getting a login window or a "PDF name" was saved message at the bottom of your page, Google may have blocked the pop up window to save the PDF.
Check the upper right hand corner of the browsers URL bar for a blocked pop up message.
Click on the message
Select always allow pop ups from : https://pdf.snapandread.com
Click on the top link to open the Microsoft or Google Log in.
You can add Snap&Read to the pop allow list.
In your Chrome Browser settings navigate to:
Settings>Advanced Setting>>Privacy and Security>> Content Settings>>Popups
Click on add to the right of allow
Enter in: https://pdf.snapandread.com:443
Click on add