This issue can not be solved only by using "chmod" command because you need to change the "~/.config/Nokia/" folder's user and group name.
By default it is assigned to root group and user, I meant that you also have to use two other commands, which are: "chgrp" and "chown"

so the steps to solve this problem are:
1.cd ~/.config/
2.sudo -s
3.chmod ugo+rwx Nokia (it will add read, write and execute premission to everyone)
4.chown root [your username] Nokia (example: chown root alex Nokia)
5.chgrp root [your groupname] Nokia (example: chgrp root alex Nokia)

Note: by default you can write your group-name as your user-name.