How do I fix this? I don't understand why I'm getting this error now

I don’t understand why there were no errors during deployment before, but now this error suddenly appears. The project used to build and run just fine without any issues, and I haven’t made any major changes that should affect the deployment process. Could someone please help me understand what might be causing this error, or if it’s related to a recent change or a temporary issue on Vercel’s side?

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