This is a repost, as the last report mysteriously vanished: 

trusted root certificates apparently missing from mono, and do not properly install using Mono's suggested command:

I'm trying to run the Duplicati backup program, which relies on mono. Getting CERTIFICATE_VERIFY_FAILED error.

The mono documentation indicates that RedHat/Fedora/Centos should already have the trusted root certificates in Mono, but if not, they can be added with the following command:

sudo cert-sync /etc/pki/tls/certs/ca-bundle.crt

But that's returning:

Unhandled Exception:
System.TypeInitializationException: The type initializer for 'System.Console' threw an exception. ---> System.TypeInitializationException: The type initializer for 'System.ConsoleDriver' threw an exception. ---> System.Exception: Magic number is wrong: 542
at System.TermInfoReader.ReadHeader (System.Byte[] buffer, System.Int32& position) [0x0002b] in <373b6e083d6e45e498c9082a8eebd27f>:0
at System.TermInfoReader..ctor (System.String term, System.String filename) [0x00065] in <373b6e083d6e45e498c9082a8eebd27f>:0
at System.TermInfoDriver..ctor (System.String term) [0x00058] in <373b6e083d6e45e498c9082a8eebd27f>:0
at System.ConsoleDriver.CreateTermInfoDriver (System.String term) [0x00000] in <373b6e083d6e45e498c9082a8eebd27f>:0
at System.ConsoleDriver..cctor () [0x00062] in <373b6e083d6e45e498c9082a8eebd27f>:0
--- End of inner exception stack trace ---
at System.Console.SetupStreams (System.Text.Encoding inputEncoding, System.Text.Encoding outputEncoding) [0x0000a] in <373b6e083d6e45e498c9082a8eebd27f>:0
at System.Console..cctor () [0x000a8] in <373b6e083d6e45e498c9082a8eebd27f>:0
--- End of inner exception stack trace ---
at Mono.Tools.CertSync.Main (System.String[] args) [0x00037] in <e14d5123bc22484f8e0510200156fa93>:0
[ERROR] FATAL UNHANDLED EXCEPTION: System.TypeInitializationException: The type initializer for 'System.Console' threw an exception. ---> System.TypeInitializationException: The type initializer for 'System.ConsoleDriver' threw an exception. ---> System.Exception: Magic number is wrong: 542
at System.TermInfoReader.ReadHeader (System.Byte[] buffer, System.Int32& position) [0x0002b] in <373b6e083d6e45e498c9082a8eebd27f>:0
at System.TermInfoReader..ctor (System.String term, System.String filename) [0x00065] in <373b6e083d6e45e498c9082a8eebd27f>:0
at System.TermInfoDriver..ctor (System.String term) [0x00058] in <373b6e083d6e45e498c9082a8eebd27f>:0
at System.ConsoleDriver.CreateTermInfoDriver (System.String term) [0x00000] in <373b6e083d6e45e498c9082a8eebd27f>:0
at System.ConsoleDriver..cctor () [0x00062] in <373b6e083d6e45e498c9082a8eebd27f>:0
--- End of inner exception stack trace ---
at System.Console.SetupStreams (System.Text.Encoding inputEncoding, System.Text.Encoding outputEncoding) [0x0000a] in <373b6e083d6e45e498c9082a8eebd27f>:0
at System.Console..cctor () [0x000a8] in <373b6e083d6e45e498c9082a8eebd27f>:0
--- End of inner exception stack trace ---
at Mono.Tools.CertSync.Main (System.String[] args) [0x00037] in <e14d5123bc22484f8e0510200156fa93>:0