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
Look at the last commit you pushed. Anything in that diff stand out that could have impacted build setup?
Try redeploying from a known working commit. In your Vercel dashboard, find the last green deployment and hit “Redeploy”.
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
Go to your dashboard
Find a previous successful deployment
Click “Redeploy” on that version
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.
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