Deploying new projects started failing on Netlify. Checking the logs I see something that was not in the logs on previous successful deploys:
Treating warnings a
You should put CI='' npm run build in your build settings.
CI='' npm run build
See error below: https://docs.netlify.com/configure-builds/troubleshooting-tips/#build-fails-on-warning-message
But its better to correct the warnings...