18.1.58: System.InvalidOperationException: GTK WebView is only supported on Linux, and requires webkit-sharp
at Eto.GtkSharp.Forms.Controls.WebViewHandler…ctor () [0x00045] in :0
at Eto.GtkSharp.Platform.b__37 () [0x00000] in :0
at Eto.Widget…ctor () [0x0006c] in <2c3b8fa69720444b9de0309b3a5e40aa>:0
at Eto.Forms.BindableWidget…ctor () [0x00000] in <2c3b8fa69720444b9de0309b3a5e40aa>:0
at Eto.Forms.Control…ctor () [0x00000] in <2c3b8fa69720444b9de0309b3a5e40aa>:0
at Eto.Forms.WebView…ctor () [0x00000] in <2c3b8fa69720444b9de0309b3a5e40aa>:0
at ManagerDesktop.WebView…ctor () [0x00000] in <2f3f6221c55c493bbbbac6790ec221e6>:0
at ManagerDesktop.Program.Main (System.String args) [0x001e8] in <2f3f6221c55c493bbbbac6790ec221e6>:0
That is a Problem from package webkitgtk, you need to recompile the package, need a lot of time.
Read the post from Link.
From time to time a have this in Manjaro Linux too, i recompile the package webkitgtk and webkitgtk 2.