3 problems

1) alot of my mangas sont get update in the site it's like chapter 20 and in the app 18 2) some manga cant load it says some error and going in the site it self and u can read it like this 3) some mangas cant find in the app I did find that the manga is in the site it self but the app cant find it And my app is version 3.1.3.4

I think it needs a new update and fast cuz I try another site but it's not working there too