Comment 12 for bug 989750

I am experiencing this problem in 14.04 (it started recently, I don't remember exactly when).
Deja dup does indeed remember the password, but it prompts for it with regular, short, intervals with the password pre-entered. I just have to press «continue» every few minutes.

Running the backup from the terminal, I get this output when the password prompt shows up:

** (deja-dup:12936): WARNING **: BackendFile.vala:487: Operasjonen ikke tillatt av motoren
** (deja-dup:12936): WARNING **: BackendFile.vala:487: Operasjonen ikke tillatt av motoren
(deja-dup:12936): Gtk-CRITICAL **: _gtk_widget_captured_event: assertion 'WIDGET_REALIZED_FOR_EVENT (widget, event)' failed

The second time the it asked, the last message even appeared three times.
«Operasjonen ikke tillatt av motoren» means «Operation not permitted by the engine».

Changing the backup destination folder does not fix the problem. In fact, no files show up in the new folder at all.
I am backing up over ftp.