[SOLVED] Flask_session error when building containerized version of Airflow using podman

I'm trying to build a container to run my airflow using only dockerfile (not docker-compose). Here is my dockerfile. I'm running this on a server linux machine I succesfully managed to build the image, but when I run, it would immediately exit and output the error: File "/usr/local/lib/python3.10/site-packages/airflow/www/session.py", line 21, in <module> from flask_session.sessions import SqlAlchemySessionInterface ModuleNotFoundError: No module named 'flask_session.sessions'

Even though I have specified my dockerfile to install Flask-Session.

Here is my dockerfile:

FROM python:3.10.13-slim-bullseye

ENV DEBIAN_FRONTEND noninteractive
ENV TERM linux

# Airflow
ARG AIRFLOW_VERSION=2.7.3
ARG AIRFLOW_DEPS=""
ARG PYTHON_DEPS=""
ENV AIRFLOW_HOME=/usr/local/airflow

# Define en_US.
ENV LANGUAGE en_US.UTF-8
ENV LANG en_US.UTF-8
ENV LC_ALL en_US.UTF-8
ENV LC_CTYPE en_US.UTF-8
ENV LC_MESSAGES en_US.UTF-8
ENV AIRFLOW__CORE__EXECUTOR LocalExecutor
RUN set -ex \
    && buildDeps=' \
        freetds-dev \
        libkrb5-dev \
        libsasl2-dev \
        libssl-dev \
        libffi-dev \
        libpq-dev \
    ' \
    && apt-get update -yqq \
    && apt-get upgrade -yqq \
    && apt-get install -yqq --no-install-recommends \
        $buildDeps \
        freetds-bin \
        build-essential \
        default-libmysqlclient-dev \
    unixodbc-dev \
        apt-utils \
        curl \
        rsync \
        netcat \
        locales \
    sudo     \
    git       \
    krb5-user \
    openssh-client \
    && apt-get install gnupg2 apt-transport-https curl -y \
    && curl https://packages.microsoft.com/keys/microsoft.asc | apt-key add - \
    && curl https://packages.microsoft.com/config/debian/11/prod.list > /etc/apt/sources.list.d/mssql-release.list \
    && apt-get update \
    && ACCEPT_EULA=Y apt-get install msodbcsql17 -y \
    && ACCEPT_EULA=Y apt-get install mssql-tools -y \
    && echo 'export PATH="$PATH:/opt/mssql-tools/bin"' >> ~/.bashrc \
    && sed -i 's/^# en_US.UTF-8 UTF-8$/en_US.UTF-8 UTF-8/g' /etc/locale.gen \
    && locale-gen \
    && update-locale LANG=en_US.UTF-8 LC_ALL=en_US.UTF-8 \
    && useradd -ms /bin/bash -d /usr/local/airflow airflow \
    && pip install -U pip setuptools wheel \
    && pip install 'SQLAlchemy==1.3.23' \
    && pip install 'Flask-SQLAlchemy==2.4.4' \
    && pip install pytz \
    && pip install pyOpenSSL \
    && pip install ndg-httpsclient \
    && pip install pyasn1 \
    && pip install openpyxl \
    && pip install pyodbc \
    && pip install pysmb \
    && pip install twilio \
    && pip install oauth2client \
    && pip install googleads \
    && pip install twitter_ads \
    && pip install google-api-python-client \
    && pip install virtualenv \
    && pip install 'werkzeug<1.0.0' \
    && pip install 'email-validator' \
    && pip install "apache-airflow[crypto,celery,hive,jdbc,ssh]==2.7.3" \
    && pip install 'redis==3.2' \
    && pip install 'Flask-Session' \
    && pip install facebook_business \
    && if [ -n "${PYTHON_DEPS}" ]; then pip install ${PYTHON_DEPS}; fi \
    && apt-get purge --auto-remove -yqq $buildDeps \
    && apt-get autoremove -yqq --purge \
    && apt-get clean \
    && rm -rf \
        /var/lib/apt/lists/* \
        /tmp/* \
        /var/tmp/* \
        /usr/share/man \
        /usr/share/doc \
        /usr/share/doc-base

And here is the logs with the error when I tried to build and run the container:

[2025-06-03T21:20:11.780+0000] {{configuration.py:2049}} INFO - Creating new FAB webserver config file in: /usr/local/airflow/webserver_config.py
/usr/local/lib/python3.10/site-packages/airflow/models/base.py:71 DeprecationWarning: The sql_alchemy_conn option in [core] has been moved to the sql_alchemy_conn option in [database] - the old setting has been used, but please update your config.
/usr/local/lib/python3.10/site-packages/airflow/models/abstractoperator.py:61 DeprecationWarning: The default_queue option in [celery] has been moved to the default_queue option in [operators] - the old setting has been used, but please update your config.
/usr/local/lib/python3.10/site-packages/airflow/models/dag.py:445 DeprecationWarning: The dag_concurrency option in [core] has been renamed to max_active_tasks_per_dag - the old setting has been used, but please update your config.
/usr/local/lib/python3.10/site-packages/airflow/models/dag.py:3753 DeprecationWarning: The dag_concurrency option in [core] has been renamed to max_active_tasks_per_dag - the old setting has been used, but please update your config.
Traceback (most recent call last):
  File "/usr/local/bin/airflow", line 8, in <module>
    sys.exit(main())
  File "/usr/local/lib/python3.10/site-packages/airflow/__main__.py", line 57, in main
    args.func(args)
  File "/usr/local/lib/python3.10/site-packages/airflow/cli/cli_config.py", line 49, in command
    return func(*args, **kwargs)
  File "/usr/local/lib/python3.10/site-packages/airflow/utils/cli.py", line 112, in wrapper
    check_and_run_migrations()
  File "/usr/local/lib/python3.10/site-packages/airflow/utils/db.py", line 829, in check_and_run_migrations
    source_heads = set(env.script.get_heads())
  File "/usr/local/lib/python3.10/site-packages/alembic/script/base.py", line 379, in get_heads
    return list(self.revision_map.heads)
  File "/usr/local/lib/python3.10/site-packages/sqlalchemy/util/langhelpers.py", line 1113, in __get__
    obj.__dict__[self.__name__] = result = self.fget(obj)
  File "/usr/local/lib/python3.10/site-packages/alembic/script/revision.py", line 155, in heads
    self._revision_map
  File "/usr/local/lib/python3.10/site-packages/sqlalchemy/util/langhelpers.py", line 1113, in __get__
    obj.__dict__[self.__name__] = result = self.fget(obj)
  File "/usr/local/lib/python3.10/site-packages/alembic/script/revision.py", line 209, in _revision_map
    for revision in self._generator():
  File "/usr/local/lib/python3.10/site-packages/alembic/script/base.py", line 159, in _load_revisions
    script = Script._from_path(self, real_path)
  File "/usr/local/lib/python3.10/site-packages/alembic/script/base.py", line 1035, in _from_path
    module = util.load_python_file(dir_, filename)
  File "/usr/local/lib/python3.10/site-packages/alembic/util/pyfiles.py", line 114, in load_python_file
    module = load_module_py(module_id, path)
  File "/usr/local/lib/python3.10/site-packages/alembic/util/pyfiles.py", line 134, in load_module_py
    spec.loader.exec_module(module)  # type: ignore
  File "<frozen importlib._bootstrap_external>", line 883, in exec_module
  File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed
  File "/usr/local/lib/python3.10/site-packages/airflow/migrations/versions/0074_2_0_0_resource_based_permissions.py", line 30, in <module>
    from airflow.www.app import cached_app
  File "/usr/local/lib/python3.10/site-packages/airflow/www/app.py", line 49, in <module>
    from airflow.www.extensions.init_session import init_airflow_session_interface
  File "/usr/local/lib/python3.10/site-packages/airflow/www/extensions/init_session.py", line 23, in <module>
    from airflow.www.session import AirflowDatabaseSessionInterface, AirflowSecureCookieSessionInterface
  File "/usr/local/lib/python3.10/site-packages/airflow/www/session.py", line 21, in <module>
    from flask_session.sessions import SqlAlchemySessionInterface
ModuleNotFoundError: No module named 'flask_session.sessions'

What do you think I should do to tackle this?