Versions

• OS: Ubuntu 18.04
• Gajim version: 1.0.1
• GTK version: 3.22.30-1ubuntu1
• Python-nbxmpp version: 0.6.4-1

Steps to reproduce the problem

1. sudo apt install gajim gajim-omemo gajim-pgp gajim-plugininstaller gajim-urlimagepreview
2. gajim

Expected behavior

Gajim opens correctly.

Actual behavior

Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/gajim/gajim.py", line 256, in _activate
    gtkgui_helpers.load_css()
  File "/usr/lib/python3/dist-packages/gajim/gtkgui_helpers.py", line 807, in load_css
    provider.load_from_data(bytes(css.encode()))
GLib.Error: gtk-css-provider-error-quark: <data>:124:19unknown value for property (1)

Notes

If I remove ~/.config/gajim and open Gajim, it opens correctly but of course I have to set it up all over again.