airflow: Airflow v2.0.0b1 package doesnt include "api_connexion/exceptions"

Apache Airflow version: 2.0.0b1

Kubernetes version (if you are using kubernetes) (use kubectl version): NA

Environment:

• Cloud provider or hardware configuration:
• OS (e.g. from /etc/os-release): macOS
• Kernel (e.g. uname -a):
• Install tools:
• Others:

What happened: Installed apache-airlfow==2.0.0b1 using pip. Running airflow webserver gave the following error:

Traceback (most recent call last):
  File "/Users/abagri/Workspace/service-workflows/venv/bin/airflow", line 8, in <module>
    sys.exit(main())
  File "/Users/abagri/Workspace/service-workflows/venv/lib/python3.8/site-packages/airflow/__main__.py", line 40, in main
    args.func(args)
  File "/Users/abagri/Workspace/service-workflows/venv/lib/python3.8/site-packages/airflow/cli/cli_parser.py", line 49, in command
    func = import_string(import_path)
  File "/Users/abagri/Workspace/service-workflows/venv/lib/python3.8/site-packages/airflow/utils/module_loading.py", line 32, in import_string
    module = import_module(module_path)
  File "/usr/local/Cellar/python@3.8/3.8.5/Frameworks/Python.framework/Versions/3.8/lib/python3.8/importlib/__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1014, in _gcd_import
  File "<frozen importlib._bootstrap>", line 991, in _find_and_load
  File "<frozen importlib._bootstrap>", line 975, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 671, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 783, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "/Users/abagri/Workspace/service-workflows/venv/lib/python3.8/site-packages/airflow/cli/commands/webserver_command.py", line 43, in <module>
    from airflow.www.app import cached_app, create_app
  File "/Users/abagri/Workspace/service-workflows/venv/lib/python3.8/site-packages/airflow/www/app.py", line 39, in <module>
    from airflow.www.extensions.init_views import (
  File "/Users/abagri/Workspace/service-workflows/venv/lib/python3.8/site-packages/airflow/www/extensions/init_views.py", line 25, in <module>
    from airflow.api_connexion.exceptions import common_error_handler
ModuleNotFoundError: No module named 'airflow.api_connexion.exceptions'

What you expected to happen: Expect this command to start the webserver

How to reproduce it: Install a fresh version of airflow, run airflow db init followed by airflow webserver

Anything else we need to know: