First login with the CLI,
press ctrl+alt+f1 or f2 then login with your user then try below steps,
found this bug here:
https://bugzilla.redhat.com/show_bug.cgi?id=1149893
Specifically you have to place .rule file here,
/etc/polkit-1/rules.d/
(add a filename and just give the .rules extension)
give below rules:
polkit.addRule(function(action, subject) {
if ((action.id == "org.freedesktop.color-manager.create-device" ||
action.id == "org.freedesktop.color-manager.create-profile" ||
action.id == "org.freedesktop.color-manager.delete-device" ||
action.id == "org.freedesktop.color-manager.delete-profile" ||
action.id == "org.freedesktop.color-manager.modify-device" ||
action.id == "org.freedesktop.color-manager.modify-profile") &&
subject.isInGroup("username")) {
return polkit.Result.YES;
}
});
Then you have to Replace the word "username" with your user's group.