Quote from Manick
I just downloaded Opera and logged in, and I was able to use the hamburger button as well as increment my lists on both the List page and series page. Can you try clearing your cache?
Hi. I didn't clear the cache, but it seems the button and adding updated chapter number on My List has been fixed somehow. Though, sometimes I was still logged out suddenly, not sure why.
I'm not sure if it was because of my connection, since I was able to browse like usual on other pages.
Anyhow, thank you for your reply! I'll try to clear cache my browser first if the problem occurs again.