Not sure what this is, any help? :)

[Wormadr]

Traceback (most recent call last):
  File "bash\bash.pyo", line 227, in main
  File "bash\bash.pyo", line 393, in _main
  File "bash\basher\__init__.pyo", line 3981, in Init
  File "bash\basher\__init__.pyo", line 4018, in InitData
  File "bash\bosh\__init__.pyo", line 1955, in refresh
  File "bash\bosh\__init__.pyo", line 1702, in _modinfos_cache_wrapper
  File "bash\bosh\__init__.pyo", line 1810, in refreshLoadOrder
  File "bash\load_order.pyo", line 300, in refresh_lo
  File "bash\load_order.pyo", line 250, in _update_cache
  File "bash\games.pyo", line 227, in get_load_order
  File "bash\games.pyo", line 246, in _cached_or_fetch
  File "bash\games.pyo", line 676, in _fetch_load_order
KeyError: bolt.Path(u'Skyrim.esm')
 

Thanks in advance to anyone who helps