system-config-network无法打开

我的网络无法打开了，想要进行网络配置都做不了，点击“网络”没反应，终端下输入“system-config-network”也不行，输出以下一些出错信息：
]# system-config-network
Traceback (most recent call last):
File "/usr/sbin/system-config-network-gui", line 53, in
from netconfpkg.exception import handleException
File "/usr/share/system-config-network/netconfpkg/__init__.py", line 61, in
exec _cmd
File "", line 1, in
File "/usr/share/system-config-network/netconfpkg/Control.py", line 29, in
import NCDeviceList
File "/usr/share/system-config-network/netconfpkg/NCDeviceList.py", line 26, in
from netconfpkg.NCDeviceFactory import getDeviceFactory
File "/usr/share/system-config-network/netconfpkg/NCDeviceFactory.py", line 74, in
from netconfpkg.plugins import *
File "/usr/share/system-config-network/netconfpkg/plugins/__init__.py", line 35, in
exec _cmd
File "", line 1, in
File "/usr/share/system-config-network/netconfpkg/plugins/NCDevCTC.py", line 22, in
from netconfpkg.NC_functions import CTC
ImportError: cannot import name CTC