Script exit with exit code 255

[8098] Failed to execute script tgnews
Traceback (most recent call last):
  File "tgnews.py", line 515, in <module>
  File "tgnews.py", line 438, in threads
  File "tgnews.py", line 427, in similar_articles
  File "pandas/core/indexing.py", line 205, in __setitem__
  File "pandas/core/indexing.py", line 547, in _setitem_with_indexer
ValueError: Must have equal len keys and value when setting with an iterable