Help : ERROR:flask_appbuilder.api:'SupersetApp' object has no attribute 'json_encoder'

[Attachai77]

How to reproduce it

• git clone https://github.com/apache/superset.git
• added SUPERSET_CONFIG_PATH=/app/docker/pythonpath_dev/superset_config.py into .env
• docker compose -f docker-compose-non-dev.yml up -d
• send request login with postman
• got error as image below.

[ducnt7-rks]

I encountered this problem same you and I tried pip install json-encoder but not works

[teeppiphatarv]

I encountered the same problem as you. Now fixed by using version 3.1.2

[marrocksd]

For those who is having this issue. The latest versions of python have built-in json_encoder method, so latest version of Flask uses that instead of their custom one, and they actually removed that from Flask.

Not sure but I think it's a problem from Flask-AppBuilder which is OOS here.
If you guys want to use version 4.x, downgrade to Flask==2.2.5 by adding it to docker/requirements-local.txt

[vtttuong]

thank you, i fixed