ImportError: cannot import name 'escape' from 'jinja2'

Some dependency seems to have introduced a conflict. When rebuilding the docker-image (thus freshly installing all dependencies) starting it now fails with the following error:

engine                 | 2022-03-24T15:19:48.493041740Z [ Run mode=prod ]
engine                 | 2022-03-24T15:19:48.493085014Z [ Docker=false ]
engine                 | 2022-03-24T15:19:48.525252859Z [ Using Python 3.9.10 ]
engine                 | 2022-03-24T15:19:48.694699623Z Traceback (most recent call last):
engine                 | 2022-03-24T15:19:48.694861675Z   File "/srv/run.py", line 27, in <module>
engine                 | 2022-03-24T15:19:48.695151046Z     from flask import Flask
engine                 | 2022-03-24T15:19:48.695246708Z   File "/usr/local/lib/python3.9/site-packages/flask/__init__.py", line 14, in <module>
engine                 | 2022-03-24T15:19:48.695447849Z     from jinja2 import escape
engine                 | 2022-03-24T15:19:48.695619918Z ImportError: cannot import name 'escape' from 'jinja2' (/usr/local/lib/python3.9/site-packages/jinja2/__init__.py)