NeoReader v2.0 hates manga

Hello, so on my e-book that has NeoReader v2.0 i started to read Pokemon manga, 7episodes were fine, but then 8th one was a bit laggy, 9th won't move from title and then it crashes, now i was reading 9th one and at like 90th page it crashes. Any idea what can i do?:blink:

Thanksies :)

EDIT:
other e-books seems fine like Witcher or any books. I read these mangas as PDF format