After a while using this app, my opinion: This unofficial app is better than the official.... Thanks you very much!.

Whatever you did, seems to have fixed it. Working perfectly now. I have my new J-novel App. Thank You !!

@sam-pinansky I just bought a Samsung Galaxy Tab A (mainly to read prepubs from here and books on Bookwalker) and can confirm it has an issue with images loading in the app. Let me know if there's any diagnostics or tests I can do to help.