word query doesn't query words

[Bercio]

Wrong behavior

Traceback (most recent call last):
File "/home/bercio/.local/share/Anki2/addons/wquery/init.py", line 38, in callback
return func(obj)
File "/home/bercio/.local/share/Anki2/addons/wquery/query.py", line 126, in query_from_editor_current_field
results = query_single_fld(editor.note, fld_index)
File "/home/bercio/.local/share/Anki2/addons/wquery/query.py", line 204, in wrap
query_func(*args, **kwargs)
File "/home/bercio/.local/share/Anki2/addons/wquery/query.py", line 243, in query_single_fld
return QueryResult()
File "/home/bercio/.local/share/Anki2/addons/wquery/service/base.py", line 425, in init
if self['result'] == None:
KeyError: 'result'

When it happened

using the addon to query a field both from the browser window and the add window

Anki v. :Traceback (most recent call last):
  File "/home/bercio/.local/share/Anki2/addons/wquery/__init__.py", line 38, in callback
    return func(obj)
  File "/home/bercio/.local/share/Anki2/addons/wquery/query.py", line 126, in query_from_editor_current_field
    results = query_single_fld(editor.note, fld_index)
  File "/home/bercio/.local/share/Anki2/addons/wquery/query.py", line 204, in wrap
    query_func(*args, **kwargs)
  File "/home/bercio/.local/share/Anki2/addons/wquery/query.py", line 243, in query_single_fld
    return QueryResult()
  File "/home/bercio/.local/share/Anki2/addons/wquery/service/base.py", line 425, in __init__
    if self['result'] == None:
KeyError: 'result'

anki version: 2.0.52,Qt 4.8.1 PyQt 4.9.1
ubuntu version 17.04