All API endpoints return 400 BadRequest w/ Werkzeug 2.1

[jantonacci]

Description

Changes in Werkzeug release 2.1 https://werkzeug.palletsprojects.com/en/2.1.x/changes/#version-2-1-0 include...

Request.get_json() will raise a 400 BadRequest error if the Content-Type header is not application/json. This makes a very common source of confusion more visible. #2339

Expected behaviour

HTTP status code 200 and 'application/json' response

Actual behaviour

HTTP status code 400 with error message...

Did not attempt to load JSON data because the request Content-Type was not 'application/json'

Steps to reproduce

pip install --upgrade Werkzeug==2.1.*

Additional info:

Output of the commands:

• Python 3.9.5
• Version: 2.13.0"

[RobbeSneyders]

Hi @jantonacci could you provide a minimal reproducable example?