v2.9.0.6 Xbuntu Bionic Beaver 18.04 update stopt GemistDownloader

[adonetubuntu]

In Ubuntu 18.04 krijg ik in de terminal deze error als ik Gemistdownloader wil starten:

Gtk-Message: 16:35:10.010: Failed to load module "appmenu-gtk-module"

deze module is niet te installeren met sudo apt install appmenu-gtk-module

Verder gaan de foutmeldingen door met:

Code:

Unhandled Exception:
System.Net.WebException: The request timed out
  at System.Net.WebClient.DownloadDataInternal (System.Uri address, System.Net.WebRequest& request) [0x0008a] in <bd46d4d4f7964dfa9beea098499ab597>:0
  at System.Net.WebClient.DownloadString (System.Uri address) [0x00027] in <bd46d4d4f7964dfa9beea098499ab597>:0
  at (wrapper remoting-invoke-with-check) System.Net.WebClient:DownloadString (System.Uri)
  at GemistDownloader.Controller.Core.UpdateToken () [0x00010] in <e51a702293b24c09a0bdb1573fd77388>:0
  at MainWindow..ctor () [0x00023] in <e51a702293b24c09a0bdb1573fd77388>:0
  at GemistDownloader.MainClass.Main (System.String[] args) [0x00005] in <e51a702293b24c09a0bdb1573fd77388>:0
[ERROR] FATAL UNHANDLED EXCEPTION: System.Net.WebException: The request timed out
  at System.Net.WebClient.DownloadDataInternal (System.Uri address, System.Net.WebRequest& request) [0x0008a] in <bd46d4d4f7964dfa9beea098499ab597>:0
  at System.Net.WebClient.DownloadString (System.Uri address) [0x00027] in <bd46d4d4f7964dfa9beea098499ab597>:0
  at (wrapper remoting-invoke-with-check) System.Net.WebClient:DownloadString (System.Uri)
  at GemistDownloader.Controller.Core.UpdateToken () [0x00010] in <e51a702293b24c09a0bdb1573fd77388>:0
  at MainWindow..ctor () [0x00023] in <e51a702293b24c09a0bdb1573fd77388>:0
  at GemistDownloader.MainClass.Main (System.String[] args) [0x00005] in <e51a702293b24c09a0bdb1573fd77388>:0

Met de tip van Frank58 werkte alles één keer wel naar behoren, maar nu krijg ik weer een andere foutmelding en weigert Gemistdownloader op te starten

Code:

Unhandled Exception:
System.IO.FileNotFoundException: Could not load file or assembly 'gtk-sharp, Version=2.12.0.0, Culture=neutral, PublicKeyToken=35e10195dab3c99f' or one of its dependencies.
File name: 'gtk-sharp, Version=2.12.0.0, Culture=neutral, PublicKeyToken=35e10195dab3c99f'
[ERROR] FATAL UNHANDLED EXCEPTION: System.IO.FileNotFoundException: Could not load file or assembly 'gtk-sharp, Version=2.12.0.0, Culture=neutral, PublicKeyToken=35e10195dab3c99f' or one of its dependencies.
File name: 'gtk-sharp, Version=2.12.0.0, Culture=neutral, PublicKeyToken=35e10195dab3c99f'

Heeft iemand nog een andere suggestie? Dank!