Holoclean error on one dataset

[DaliGaoudi]

Hello everyone, I am getting this error when running Holoclean on a dataset:
below is a copy of the console log.
What is the error and how to fix it please

03:34:40 - [DEBUG] - Starting to execute query SELECT t1.tid FROM "eudract" as t1 WHERE EXISTS (SELECT t2.tid FROM "eudract" as t2 WHERE t1."eudract_number"=t2."eudract_number" AND t1."double_blind"<>t2."double_blind") with id 18
03:34:40 - [DEBUG] - Time to execute query with id 18: 0.00 secs
03:34:40 - [DEBUG] - Time to execute 19 queries: 0.04 secs
03:34:40 - [DEBUG] - DONE with Error Detector: ViolationDetector in 0.05 secs
Traceback (most recent call last):
File "/home/dalig/Documents/BPC/HoloClean/holoclean/hc36/lib/python3.7/site-packages/pandas/core/frame.py", line 3424, in _ensure_valid_index
value = Series(value)
File "/home/dalig/Documents/BPC/HoloClean/holoclean/hc36/lib/python3.7/site-packages/pandas/core/series.py", line 264, in init
data = SingleBlockManager(data, index, fastpath=True)
File "/home/dalig/Documents/BPC/HoloClean/holoclean/hc36/lib/python3.7/site-packages/pandas/core/internals/managers.py", line 1481, in init
block = make_block(block, placement=slice(0, len(axis)), ndim=1)
File "/home/dalig/Documents/BPC/HoloClean/holoclean/hc36/lib/python3.7/site-packages/pandas/core/internals/blocks.py", line 3095, in make_block
return klass(values, ndim=ndim, placement=placement)
File "/home/dalig/Documents/BPC/HoloClean/holoclean/hc36/lib/python3.7/site-packages/pandas/core/internals/blocks.py", line 2631, in init
placement=placement)
File "/home/dalig/Documents/BPC/HoloClean/holoclean/hc36/lib/python3.7/site-packages/pandas/core/internals/blocks.py", line 87, in init
'{mgr}'.format(val=len(self.values), mgr=len(self.mgr_locs)))
ValueError: Wrong number of items passed 2, placement implies 0

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "eudract.py", line 37, in
hc.detect_errors(detectors)
File "/home/dalig/Documents/BPC/HoloClean/holoclean/holoclean.py", line 308, in detect_errors
status, detect_time = self.detect_engine.detect_errors(detect_list)
File "/home/dalig/Documents/BPC/HoloClean/holoclean/detect/detect.py", line 36, in detect_errors
errors_df['cid'] = errors_df.apply(lambda x: self.ds.get_cell_id(x['tid'], x['attribute']), axis=1)
File "/home/dalig/Documents/BPC/HoloClean/holoclean/hc36/lib/python3.7/site-packages/pandas/core/frame.py", line 3370, in setitem
self._set_item(key, value)
File "/home/dalig/Documents/BPC/HoloClean/holoclean/hc36/lib/python3.7/site-packages/pandas/core/frame.py", line 3444, in _set_item
self._ensure_valid_index(value)
File "/home/dalig/Documents/BPC/HoloClean/holoclean/hc36/lib/python3.7/site-packages/pandas/core/frame.py", line 3426, in _ensure_valid_index
raise ValueError('Cannot set a frame with no defined index '
ValueError: Cannot set a frame with no defined index and a value that cannot be converted to a Series