GRASS Gis v 6.4.4. KeyError: 'version' when start

When I try to start the GRASS it gives me the following error

GRASS 6.4.4 (Hellas):~ > ERROR: MAPSET Hellas - permission denied
Traceback (most recent call last):
File "/opt/grass64/etc/wxpython/wxgui.py", line 140, in <module>
  sys.exit(main())
File "/opt/grass64/etc/wxpython/wxgui.py", line 133, in main
  app = GMApp(workspaceFile)
File "/opt/grass64/etc/wxpython/wxgui.py", line 45, in __init__
  wx.App.__init__(self, False)
File "/usr/lib64/python2.7/site-packages/wx-3.0-gtk2/wx/_core.py", line 8628, in __init__
 self._BootstrapApp()
File "/usr/lib64/python2.7/site-packages/wx-3.0-gtk2/wx/_core.py", line 8196, in _BootstrapApp
 return _core_.PyApp__BootstrapApp(*args, **kwargs)
File "/opt/grass64/etc/wxpython/wxgui.py", line 79, in OnInit
 workspace = self.workspaceFile)
File "/opt/grass64/etc/wxpython/lmgr/frame.py", line 83, in __init__
 self.baseTitle = _("GRASS GIS %s Layer Manager") % grass.version()['version']
KeyError: 'version'

My operating system is Manjaro linux.

What cause this problem and how can this fixed?