AttributeError: module 'sqlalchemy' has no attribute '__all__'

[iROCKBUNNY]

I suspect that there is compatibility issue with SQLAlchemy 2.0.

File "/.../venv/lib/python3.9/site-packages/flask_sqlalchemy/extension.py", line 982, in __getattr__
    if name in mod.__all__:
AttributeError: module 'sqlalchemy' has no attribute '__all__'

Environment:

• Python version: 3.9.6
• Flask-SQLAlchemy version: 3.0.1
• SQLAlchemy version: 2.0.0b1