Cinnamon: Linux Mint theme window not opening after mint update 19.2

[Dhineshss]

I upgraded linux mint from 19.1 to 19.2. After the update, theme window is not opening. Nothing happens when click the theme icon in the settings.

[JosephMcc]

This is more likely some problem with cinnamon settings, not the themes. Could you open a terminal and run cinnamon-setting themes and give us the output?

[Dhineshss]

Thanks. I tried the command. Its may be a crash

dhinesh@dhinesh-HP-Notebook:~$ cinnamon-settings themes
True
Using PAM module (python3-pam)
Loading Themes module

(cinnamon-settings.py:5059): Gdk-CRITICAL **: 09:25:52.435: gdk_screen_get_setting: assertion 'GDK_IS_SCREEN (screen)' failed
Traceback (most recent call last):
  File "/usr/share/cinnamon/cinnamon-settings/cinnamon-settings.py", line 724, in <module>
    window = MainWindow()
  File "/usr/share/cinnamon/cinnamon-settings/cinnamon-settings.py", line 428, in __init__
    self.go_to_sidepage(cat, path, user_action=False)
  File "/usr/share/cinnamon/cinnamon-settings/cinnamon-settings.py", line 185, in go_to_sidepage
    sidePage.build()
  File "/usr/share/cinnamon/cinnamon-settings/bin/SettingsWidgets.py", line 123, in build
    self.module.on_module_selected()
  File "/usr/share/cinnamon/cinnamon-settings/modules/cs_themes.py", line 113, in on_module_selected
    widget.sync_initial_switch_state()
  File "/usr/share/cinnamon/cinnamon-settings/bin/CinnamonGtkSettings.py", line 194, in sync_initial_switch_state
    if editor.get_declaration(self.selector, decl_name):
  File "/usr/share/cinnamon/cinnamon-settings/bin/CinnamonGtkSettings.py", line 114, in get_declaration
    rs = self.get_ruleset(selector)
  File "/usr/share/cinnamon/cinnamon-settings/bin/CinnamonGtkSettings.py", line 105, in get_ruleset
    if rs.selector.as_css() == selector_css:
AttributeError: 'ImportRule' object has no attribute 'selector'

[mtwebster]

Can you share the contents of your ~/.config/gtk-3.0/gtk.css file? (If you have one)

Thanks

[claudiux]

@Dhineshss Try to reinstall the cinnamon-common package:
sudo apt-get install --reinstall cinnamon-common

[claudiux]

@mtwebster I don't have any ~/.config/gtk-3.0/gtk.css file and cinnamon-settings works fine.
@Dhineshss Maybe trying to rename this file, if it exists:
mv ~/.config/gtk-3.0/gtk.css ~/.config/gtk-3.0/gtk.css_OLD
Then, log off and log on you.

[Dhineshss]

@mtwebster gtk.css file contains the followings

@import url('/home/dhinesh/.local/share/gnome-shell/extensions/[email protected]/stylesheet.css');
@import url('/home/dhinesh/.local/share/gnome-shell/extensions/[email protected]/stylesheet-tiled.css');

I just checked the url files are exists in the system.

[Dhineshss]

@claudiux Thanks your solutions works. I just renamed the file 'gtk.css' & works immeadiatly. Thank you

[claudiux]

@Dhineshss The ~/.local/share/gnome-shell doesn't exist in my home directory. Maybe a filth of an old installation?

[claudiux]

@Dhineshss Maybe you can close this issue?

[cosminribo]

This is an old and closed issue but the solution of moving the gtk.css file out of the way solved the problem for me on a Ubuntu 18.04 running Cinnamon 4.2.4. Thank you.