AttributeError: 'NoneType' object has no attribute 'find_all'

Estou tentando gerar a base porém quando rodo o script, me retorna este erro. sabe o que poderia ser?
```
Traceback (most recent call last):
  File "capturaDados.py", line 131, in <module>
    generateCSV(res, station_name)
  File "capturaDados.py", line 55, in generateCSV
    rows = table_body.find_all('tr')
AttributeError: 'NoneType' object has no attribute 'find_all'
```