Bug in free Bike Borrow template (can't publish)

I’m using Bike Borrow by David Siegel FREE template.
When I click ‘share’ to publish , it forces me to Upgrade app to Pro.

“Upgrade app to Pro. This app uses a sheet in a Shared Drive, which is a Pro feature. Upgrade your app to Pro to publish it.”

The sheet that is used for the app is in my drive and not shared to anyone.


Looks like a bug! Thanks.