Question: This app is no longer shared with you
My wife got the error "This app is no longer shared with you" after she updated to iOS 11.2.5 on her iPhone SE and tried to access the app "Streaks" which I had purchased and she downloaded using Family Sharing. I found another prominent discussion about the issue which was closed, however I wanted to post the solution I found for others to find.
I tried the follow without it fixing the issue
1. Shutting off the iPhone by holding down the power button
2. Signing out of her Apple ID and signing in again
3. Turning off app sharing under the FamilySharing section of my account
What finally solved the problem was
Going to Settings>General>iPhone Storage>scrolling down to the app "Streaks" and selecting>"offload app" and then reinstalling it.
This did not delete her information as per the new offload feature, and she no longer gets the error. I hope this helps others struggling with the issue especially after an update.
iPhone SE, iOS 11.2.5, null