Manga Viewer funktioniert nicht

Please change your settings. - Screen off option: When set to ON, the screen automatically turns off at the time the device turns off. - Next book auto-switching options: If you automatically change the next book switching option in Settings, tabs on the last page will automatically switch to the next book. - iCloud Sync : Synchronize the information (read location) of the read file and open the same file on another device (signed in with the same iCloud account) so that you can see it again. -Vertical scroll mode (= webtoon mode): scrolls vertically like webtoons, one-page mode is fixed, and some options are fixed and not applied. - Night Mode - Invert Color: Invert the white background to black (gray) and black to white.  This mode is suitable for viewing novels. - Night Mode - Image Brightness: You can change the brightness of the image in three steps without changing the screen brightness of the device. - A function that changes to the next page when the volume is changed. (The sound size will change as well. Please be careful. ON / OFF in setting.  - Image next page Zoom-in keep-alive function: Apply the previous book's zoom-in status in the following book.  Please send bugs or suggestions to junhuloveapple@gmail. com at the top right of the setting screen.  Need an in-app purchase or reward view.