In Ubuntu you can empty the /tmp dir automatically after ... hour or days. I had it set on 1 hour and that's why Duplicity/Deja Dup was failing for the same as in this bug report. Setting this setting (system config > privacy) to 1 or more days solved it.
I had this also and I know what it is.
In Ubuntu you can empty the /tmp dir automatically after ... hour or days. I had it set on 1 hour and that's why Duplicity/Deja Dup was failing for the same as in this bug report. Setting this setting (system config > privacy) to 1 or more days solved it.