How do I stop the "Sign in to add a Google Account" Pop-Up in Chromebook CB314-1H

I have the answer to my posted question, but cannot figure-out how to properly answer my own question and 'close' my question. My solution may benefit other members.

Pop-Up Stopped !

Solution Result: no “Pop-Up” for 2 days now, and no unintended ‘side-effects’ noticed.

I was finally able to stop the “Add Google Account” Pop-Up on my Wife’s Acer Chromebook. The Pop-Up in this case is the result of a “redirection” by a web_app, so my solution will only work to stop such Pop-Ups. However, it may provide community members a route to resolving other Chromebook problems.

Strangely, to me at least, is that to stop this Pop-Up requires entering “Setup” in a manner different than my usual manner: entering “Setup” from either the app “Launcher” or from clicking the “Clock”, both on my taskbar. Neither method will provide the needed access to “Setup”. Rather, I had to enter “Setup” by ‘clicking’ on the three-dot bar at the top right of my Chrome screen, and clicking “Setup” at the bottom of the menu. The “Setup” screen will look different, and offer options that are a bit different also: e.g., “”Privacy and Security” option rather than “Security and Privacy”.

Once I entered “Setup” in this manner I chose “Privacy and Security” > “Site Settings” > “Pop-ups and redirects”, and added the web address associated with the “Pop-Up” to the “Not allowed to send pop-ups or use redirects” in the “Customized behaviors” section.