usatoday.py is raising an exception and failing to parse many pages

[pmyteh]

2020-01-17 11:41:01 [scrapy.core.scraper] ERROR: Spider error processing <GET https://www.usatoday.com/story/sports/sports-betting/2020/01/17/anaheim-ducks-at-carolina-hurricanes-odds-picks-and-best-bets/41014307/> (referer: https://www.usatoday.com/news-sitemap.xml)
Traceback (most recent call last):
  File "/home/euler/miniconda3/envs/pytorch/lib/python3.7/site-packages/scrapy/loader/processors.py", line 59, in __call__
    value = func(value)
  File "/home/euler/miniconda3/envs/pytorch/lib/python3.7/site-packages/scrapy/loader/processors.py", line 107, in __call__
    return self.separator.join(values)
  File "/mnt/data1/NLP/RISJbot-master/RISJbot/loaders.py", line 42, in _strip_strl
    yield s.strip()
AttributeError: 'int' object has no attribute 'strip'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/euler/miniconda3/envs/pytorch/lib/python3.7/site-packages/scrapy/loader/__init__.py", line 159, in _process_input_value
    return proc(value)
  File "/home/euler/miniconda3/envs/pytorch/lib/python3.7/site-packages/scrapy/loader/processors.py", line 63, in __call__
    (str(func), value, type(e).__name__, str(e)))
ValueError: Error in Compose with <scrapy.loader.processors.Join object at 0x7f4bf64d1dd0> value=<generator object _strip_strl at 0x7f4be104a8d0> error='AttributeError: 'int' object has no attribute 'strip''

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/euler/miniconda3/envs/pytorch/lib/python3.7/site-packages/twisted/internet/defer.py", line 654, in _runCallbacks
    current.result = callback(current.result, *args, **kw)
  File "/mnt/data1/NLP/RISJbot-master/RISJbot/spiders/newssitemapspider.py", line 29, in parse
    return self.parse_page(response)
  File "/mnt/data1/NLP/RISJbot-master/RISJbot/spiders/us/usatoday.py", line 60, in parse_page
    l.add_schemaorg(response)
  File "/mnt/data1/NLP/RISJbot-master/RISJbot/loaders.py", line 171, in add_schemaorg
    rdfa=False)
  File "/mnt/data1/NLP/RISJbot-master/RISJbot/loaders.py", line 184, in add_schemaorg_mde
    self.add_value('keywords',     data.get('keywords'))
  File "/home/euler/miniconda3/envs/pytorch/lib/python3.7/site-packages/scrapy/loader/__init__.py", line 78, in add_value
    self._add_value(field_name, value)
  File "/home/euler/miniconda3/envs/pytorch/lib/python3.7/site-packages/scrapy/loader/__init__.py", line 92, in _add_value
    processed_value = self._process_input_value(field_name, value)
  File "/home/euler/miniconda3/envs/pytorch/lib/python3.7/site-packages/scrapy/loader/__init__.py", line 164, in _process_input_value
    value, type(e).__name__, str(e)))
ValueError: Error with input processor Compose: field='keywords' value=[2] error='ValueError: Error in Compose with <scrapy.loader.processors.Join object at 0x7f4bf64d1dd0> value=<generator object _strip_strl at 0x7f4be104a8d0> error='AttributeError: 'int' object has no attribute 'strip'''