Thanks for sharing this! Error code 1 is unfortunately a very generic build failure. It can come from a bunch of different things. Since you mentioned this only started after a particular commit and now affects all deployments, here are a few things you can try right away:

Quick things to check

1. Look at the last commit you pushed. Anything in that diff stand out that could have impacted build setup?
2. Try redeploying from a known working commit. In your Vercel dashboard, find the last green deployment and hit “Redeploy”.
3. Open the detailed build logs. In the failed deployment, there should be a more specific error message than just “error code 1”.

Common causes for Python / FastAPI projects

• Missing or incorrect requirements.txt
• Python version mismatch (runtime vs local)
• Environment variables missing during build
• Build commands defined incorrectly in vercel.json

What I would suggest right now

1. Go to your dashboard
2. Find a previous successful deployment
3. Click “Redeploy” on that version
4. Then grab the specific error output from your failed build logs

If you can paste that specific error text here (beyond just “error code 1”), we can help you narrow this down much more precisely.

Helpful docs:

• https://vercel.com/docs/deployments/builds
• https://vercel.com/docs/functions/runtimes/python

Cross-posting this as well in case it's helpful

community.vercel.com/t/how-to-get-good-answers/158

Hey! We're running this session next week after our recent announcement of Gel joining the team. Because you had posted about Python, I thought I'd give you a heads up in case you wanted to join us! :D

https://community.vercel.com/t/community-session-vercel-python/29118

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