Uninformative "Internal server error" after 'space push'

[fmatter]

I have an existing pyramid app. I followed the python guide for space; it was easy to adapt the fastapi/flask instructions for pyramid. Here are my main.py and Spacefile files:

from paste.deploy import loadapp
app = loadapp('config:development.ini', relative_to='.')

# Spacefile Docs: https://go.deta.dev/docs/spacefile/v0
v: 0
micros:
  - name: coco
    src: ./
    engine: python3.9
    primary: true
    run: gunicorn main:app
    dev: pserve --reload development.ini

Running space dev (and also gunicorn main:app!) works flawlessly on my machine. However, when I run space push I get this very non-descript output:

Validating your Spacefile...
                                                     
Your Spacefile looks good, proceeding with your push!

✓ Successfully started your build!
✓ Successfully pushed your Spacefile!
! Failed to push code: failed to push code, Internal server error
Error: failed to push code, Internal server error

Is there any way to know a little more about what went wrong so I can fix it? Like logfiles?