No it's not that. I've got exactly the same problem after update to Ubonto 18.10.
And it runs fine with wine.
Hmm. Mono seems broken.
A command like mono-test-install gives the same result:
Active Mono: /usr/bin/mono
Your have a working System.Drawing setup
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 <8f2c484307284b51944a1a13a14c0266>:0
at System.TermInfoReader..ctor (System.String term, System.String filename) [0x00065] in <8f2c484307284b51944a1a13a14c0266>:0
at System.TermInfoDriver..ctor (System.String term) [0x00058] in <8f2c484307284b51944a1a13a14c0266>:0
at System.ConsoleDriver.CreateTermInfoDriver (System.String term) [0x00000] in <8f2c484307284b51944a1a13a14c0266>:0
at System.ConsoleDriver..cctor () [0x00062] in <8f2c484307284b51944a1a13a14c0266>:0
--- End of inner exception stack trace ---
at System.Console.SetupStreams (System.Text.Encoding inputEncoding, System.Text.Encoding outputEncoding) [0x0000a] in <8f2c484307284b51944a1a13a14c0266>:0
at System.Console..cctor () [0x000a8] in <8f2c484307284b51944a1a13a14c0266>:0
--- End of inner exception stack trace ---
at Program.Main () [0x00033] in <0620e04b94d44be89673bf0e0c63b929>: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 <8f2c484307284b51944a1a13a14c0266>:0
at System.TermInfoReader..ctor (System.String term, System.String filename) [0x00065] in <8f2c484307284b51944a1a13a14c0266>:0
at System.TermInfoDriver..ctor (System.String term) [0x00058] in <8f2c484307284b51944a1a13a14c0266>:0
at System.ConsoleDriver.CreateTermInfoDriver (System.String term) [0x00000] in <8f2c484307284b51944a1a13a14c0266>:0
at System.ConsoleDriver..cctor () [0x00062] in <8f2c484307284b51944a1a13a14c0266>:0
--- End of inner exception stack trace ---
at System.Console.SetupStreams (System.Text.Encoding inputEncoding, System.Text.Encoding outputEncoding) [0x0000a] in <8f2c484307284b51944a1a13a14c0266>:0
at System.Console..cctor () [0x000a8] in <8f2c484307284b51944a1a13a14c0266>:0
--- End of inner exception stack trace ---
at Program.Main () [0x00033] in <0620e04b94d44be89673bf0e0c63b929>:0