So some comments online suggest that whenever the workers fail to boot without error message, it's likely the app itself that crashes.
Running `FLASK_APP=KerbalStuff.app flask run`  gives me
```
RuntimeError: Click will abort further execution because Python 3 was configured to use ASCII as encoding for the environment. Consult https://click.palletsprojects.com/en/7.x/python3/ for mitigation steps.

This system supports the C.UTF-8 locale which is recommended.
You might be able to resolve your issue by exporting the
following environment variables:

export LC_ALL=C.UTF-8
export LANG=C.UTF-8
```
No idea whether I'm on the right track