TypeError: sequence item 0: expected string, NoneType found

If you’ve arrived here because you were looking for the root cause of “TypeError: sequence item 0: expected string, NoneType found“, it can come from doing something along these lines…

','.join([None])

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Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)