This morning the official Flippity Twitter account posted an important update. The update is that the Flippity Google Sheets add-on was broken by the deprecation of the Goo.gl URL shortener. That's the bad news. The good news is that an updated version is on its way. The updated version has been submitted to Google for review. In the meantime, you can still use the Flippity templates by going to Flippity.net and selecting "template" on any of the templates that you want to use. When you click "template" on Flippity a copy of the template will be opened in your Google Sheets account.
Hey Flippity fans. Bad news: The Flippity Add-on got broken when Google decided to kill off their URL shortener. Good news: The Add-on developer has fixed (and improved) it. New version (1.6) currently under review by Google before it goes live.— Flippity (@flippitynet) April 8, 2019
Watch my video to see how you can use Flippity's templates without using the Google Sheets add-on.