This is Lan from Not A Basement Studio. Thanks for reaching out.
This issue may have been caused by a data corruption in your device. The following steps should help you resolve the issue:
- Go to your Device Settings > Storage & USB
- Go to Apps Storage > Manga Rock
- Tap “Clear Data” then relaunch Manga Rock
Important: You should backup your data beforehand and will need to re-download previously downloaded manga if necessary (note that this action won’t charge any rocks).
This should address the issue you’re having. If you still have issues, please let me know.
Thank you for supporting us, and we are sorry for the inconvenience caused.