[Important Notice] Malfunction with the iOS app which requires "Additional Sign-in"

Thank you for using BOOK☆WALKER.

On September 25, 2018, BOOK☆WALKER app has been merged with the Niconico Book app.

Due to this merger, there is currently a malfunction with the iOS app version 5.0.0 to 5.0.1, which requires "Additional Sign-in" even if you do not have a Niconico account.
In such case, please follow the steps below to fix the issue.

Steps

1. Update the app to the latest version (version 5.0.1)

2. Start up the app. Sign out from the app first, then sign-in again.

3. Select "Settings" > "Re-create Book List"
*Please select "No" if an "Additional Sign-in" message is displayed.

We sincerely apologize to all our customers for any inconvenience caused by this malfunction. Please contact support if you have any further issues.