Paperback extention doesn't sync the read progress to komga server

[SurjitSahoo]

Steps to reproduce

1. Go to settings > Extensions > Paperback (the default extention) > Server settings >
   Update the server address, username, password etc
2. Browse manga, pick a manga to read.
3. Add as tracked title. (it'll show Manga ID, and a message: The app will sync read chapters to the komga server)
4. Click submit
5. Start reading the manga

Check the komga server, and notice no read progress is ever updated.