I am running Duplicati on a ReadyNAS. I had email notifications working a couple of weeks ago, and then there was a firmware update for the NAS, which I think broke the email function (backup jobs appear to still be running). I have to admit I don’t really understand what this error message is telli…

Well, it’s fixed. I edited one of the lines in the installation guide @kees-z wrote to: echo "deb http://download.mono-project.com/repo/debian jessie main" | sudo tee /etc/apt/sources.list.d/mono-xamarin.list (Changed “wheezy” to “jessie”) Then apt-get update, followed by apt-get -y install mono…

NAS firmware upgrade breaks mono (wrong mono version)

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JonMikelV November 12, 2017, 12:07am 2

It looks like the ReadyNAS update may have nuked your mono SSL certificates.

I don’t know how ReadyNAS updates work but can you try certificate install as mentioned here?