Error to run the example

[SeqCrafter]

My codes:

import reflex as rx
from reflex_altair import altair_chart
import altair as alt
import pandas as pd

chart_spec = (
        alt.Chart(alt.Data(name="dataset_id"))
        .mark_bar()
        .encode(x="category:O", y="value:Q", tooltip=["category", "value"])
        .properties(title="Bar Chart Example")
    )

class altairState(rx.State):
    
    chart_data: dict = {
        "dataset_id": pd.DataFrame(
            {"category": ["A", "B", "C"], "value": [28, 55, 43]}
        ).to_dict("records")
    }


@rx.page(route="/altair")
def altair_plots() -> rx.Component:
    return rx.container(
        rx.flex(
            rx.heading("test figure plots:"),
            altair_chart(
                spec=chart_spec,
                data=altairState.chart_data,
                actions=False,
                download_file_name="filename",
            ),
            width="100",
            direction="column",
        ),
        width="100%",
    )

error message:

TypeError: Unsupported type <class 'altair.vegalite.v5.api.Chart'> for LiteralVar. Tried to create a LiteralVar from alt.Chart(...).