Printing with CUPS seems to be broken within the GNUstep apps

[Patrick CARDONA]

Hi All,

- General description :
When I try to print a document from any GNUstep app, the "print" menu 
is highlighted, but nothing happens... The Print panel is never shown. 
No error message.
Cups printing is working well with others apps (ImageMagick, 
Firefox...) but not in GNUstep.

- Steps to reproduce :
1) openapp GWorkspace
2) Select a .txt document in the FileViewer
3) Main menu : "print" or #p

IDEM with Ink :
1) openapp Ink
2) Open a txt document (#o)
3) When the document is loaded, main menu : "print" or #p

I tried to find a test in GSTest, but I did not find any matching the 
printing process.

- My context :
OS : GNU/Linux Ubuntu 18.04 (LTS)
WM : WindowMaker
GNUstep - All packages from the official deb packages of that distro :
Base : 1.25.1
Gui & Back : 0.26.2-3
Make : 2.7.0-3

Any Idea ?

Bye !

P.S. : I apologize my bad english. I hope to be clear enough.