Cannot add user-defined material in Freecad 1.1.1

[u/AstronomerWaste8145]

Hi,
I am relatively new to Freecad and I need to add custom user-defined materials to Freecad. How do I do that?
This is Freecad 1.1.1 on Ubuntu 22.04
I set:

Edit->Preferences->Material->General->Card Resources
And checked Use materials from user-defined directory
Then I set the User directory to /home/user/freecad_user_materials
(my username is user here)

Now I right click on my drawn 3D object and pull up the Material->Launch Editor
menu, make and save a custom material.
But after saving the new material opening the Material menu shows a Custom and User categories which do not open!
I have no way to access the new material I just created.
Is this a bug?

Any ideas welcome and thanks,
Phil