FWIW, I've stumbled across a similar issue due to the same bad practice in the HTML (rows where the number of cells in the row exceeded the initial default)

The problem appears to be that the cell function in the tables.py file doesn't check if the cell exists before trying to access it. I've modified my local version to the following.

Check the index doesn't exceed the array, if it does return None. Depending on how you're using this, you may need to make further changes upstream.

    def cell(self, row_idx, col_idx):
        """
        Return |_Cell| instance correponding to table cell at *row_idx*,
        *col_idx* intersection, where (0, 0) is the top, left-most cell.
        """
        cell_idx = col_idx + (row_idx * self._column_count)
        if cell_idx >= len(self._cells):
            return None
        return self._cells[cell_idx]

try #881 (comment)

try #881 (comment)

Thanks for a workaround, maybe someone find it helpful, but in the end this need to be fixed within the library.

Fixed in v1.1.1 circa Apr 30, 2024.