After I made some updates I got the same problem with
Firefox
kmozillahelper(10029)/kdecore (KSycoca): Trying to open ksycoca from “/var/tmp/kdecache-sir/ksycoca4”
/usr/lib64/firefox/firefox: symbol lookup error: /usr/lib64/gio/modules/libdconfsettings.so: undefined symbol: g_settings_backend_get_type
Thunderbird
/usr/lib64/thunderbird/thunderbird-bin: symbol lookup error: /usr/lib64/gio/modules/libdconfsettings.so: undefined symbol: g_settings_backend_get_type
I guess that it has something to do with libdconfsettings.so
confirming the bug: i was getting /usr/lib/vmware/bin/vmplayer: symbol lookup error: /usr/lib/gio/modules/libdconfsettings.so: undefined symbol: g_settings_backend_get_type error when tried to run vmplayer, and
sudo rpm -ef gsettings-backend-dconf
fixed this problem.