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Does anybody know what this error is from?

File "/usr/local/lib/python3.6/site-packages/scrapy/extensions/spiderstate.py", line 28, in spider_closed

    pickle.dump(spider.state, f, protocol=2)

AttributeError: 'CincinnatiartsSpider' object has no attribute 'state'

https://app.scrapinghub.com/p/206606/36/5496/log?line=37&filterType=error