ubuntu-tweak 没有启动

当我尝试在终端中运行 ubuntu-tweak 时，我得到以下信息：

adwaita@adwaita-HP-2000-Notebook-PC:~$ ubuntu-tweak

Attempt to unlock mutex that was not locked

Aborted

adwaita@adwaita-HP-2000-Notebook-PC:~$ ubuntu-tweak -d

[Launcher][DEBUG] Distribution: Ubuntu 14.04 trusty

Application: Ubuntu Tweak 0.8.8-1~trusty1

Desktop:gnome (ubuntu-tweak:84)

Attempt to unlock mutex that was not locked

Aborted

adwaita@adwaita-HP-2000-Notebook-PC:~$

现在要做什么？这是一个错误吗？