The problem when you open any torrent file and after few seconds appear error massage “unable to save: resume file permission denied”
solve this problem, change the owner and group of user config transmission folder
open your terminal and write
$sudo chown username:username ~/.config/transmission/ -R
write your root password and open your transmission program.
on my machine my user name is “amrzaki”
To know your username on your machine write command “users” without double quotes