Hi everyone, we have confirmed a bug affecting the Downloaded manga in MR2: anytime a new chapter for the downloaded manga is released, it will cause the app to be unable to open the downloaded chapters.
The coming update will fix this issue.
In the mean time, you have to delete and re-download to view those affected manga again. If you don’t want to re-download, please wait for the coming update, which should be available next week once Apple finishes reviewing the app. Thank you for your understanding and we are deeply sorry for the inconvenience caused.
The NAB Team