I can't login to the website using facebook.
Tried logging out in facebook.
Tried unlinking the app from facebook and relinking it, also fails.
It pops up a small window every time i login, that closes immediatly, and it brings me back to mangarock homepage without logging in.
Sorry to hear about your problem.
Please open Manga Rock and send us an email support (Settings/ Email support) with more details about your issue.
Our Support Team will get back to you shortly. Thanks a lot!