Почему не получается сохранять графики plotly как картинки?

def create_plot(data_before, data_after, time_column, Pokazatel, recommended_value, y_title, color_before, color_after, doc, caption, include_recommended_value=True):
    data_before[time_column] = pd.to_datetime(data_before[time_column])
    data_after[time_column] = pd.to_datetime(data_after[time_column])

    data_before = data_before.dropna(subset=[Pokazatel])
    data_after = data_after.dropna(subset=[Pokazatel])

    category_name = {
        'pH': 'Водородный показатель',
        'Suspended_solids': 'Взвешенные вещества',
        'Petroleum_products': 'Нефтепродукты',
        'Total_iron': 'Железо общее'
    }.get(Pokazatel, Pokazatel)

    min_value = min(data_before[Pokazatel].min(), data_after[Pokazatel].min())
    max_value = max(data_before[Pokazatel].max(), data_after[Pokazatel].max())

    y_lower = math.floor(min_value - 0.5) if min_value - 0.5 > 0 else 0

    data_range = max_value - min_value
    grid_step = math.ceil(data_range / 10)  

    y_upper = math.ceil(max(max_value, recommended_value) / grid_step) * grid_step + grid_step

    if recommended_value is None:
        recommended_value = 0  

    fig = go.Figure()

    last_selection_point_before = data_before['Selection_point'].iloc[-1]

    fig.add_trace(go.Scatter(
        x=data_before[time_column],
        y=data_before[Pokazatel],
        mode='lines+markers',
        name=f'До очистки ({last_selection_point_before})',
        line=dict(color=color_before, width=3),
        marker=dict(size=10)
    ))

    last_selection_point_after = data_after['Selection_point'].iloc[-1]

    fig.add_trace(go.Scatter(
        x=data_after[time_column],
        y=data_after[Pokazatel],
        mode='lines+markers',
        name=f'После очистки ({last_selection_point_after})',
        line=dict(color=color_after, width=3),
        marker=dict(size=10)
    ))

    if include_recommended_value:
        fig.add_shape(
            type="line",
            x0=start_date - pd.Timedelta(days=10),
            x1=end_date + pd.Timedelta(days=10),
            y0=recommended_value,
            y1=recommended_value,
            line=dict(color="red", width=3),
        )
        fig.add_trace(go.Scatter(
            x=[None], y=[None],
            mode='lines',
            line=dict(color='red', width=3),
            name='Рекомендуемое значение'
        ))

    fig.update_yaxes(tickformat=",.1f", title=y_title, range=[y_lower, y_upper])
    fig.update_xaxes(tickformat="%d.%m.%Y", tickangle=270, title=None)
    fig.update_layout(
        showlegend=True,
        legend=dict(
            title_text='',
            orientation="h",
            yanchor="bottom",
            y=1,
            xanchor="center",
            x=0.5
        ),
        margin=dict(l=0, r=0, t=0, b=0),
        font=dict(family="Times New Roman", size=16)
    )

    try:
        img_bytes = fig.to_image(format="png", width=700, height=450, scale=3)
    except Exception as e:
        print(f"Ошибка при создании изображения: {e}")
        return

    doc.add_picture(io.BytesIO(img_bytes), width=Inches(5.9), height=Inches(3.52))
    last_paragraph = doc.paragraphs[-1]
    last_paragraph.alignment = WD_PARAGRAPH_ALIGNMENT.CENTER
    caption_paragraph = doc.add_paragraph(caption)
    caption_paragraph.alignment = WD_PARAGRAPH_ALIGNMENT.CENTER
    caption_paragraph.style.font.name = 'Times New Roman'
    caption_paragraph.style.font.size = Pt(12)

В строку конвертировал, но тогда весь макет графика сбивается.