What this error means

Module not found: Can't resolve '@/components/forms/RegisterForm' — Error: Command "npm run build" exited with 1 is a Vercel failure pattern reported for developers trying to next.js project builds successfully locally on windows/macos but fails on vercel with case-sensitive module import errors; needs cross-platform fix.. Based on the imported evidence, treat this as a tool-specific troubleshooting page rather than a generic API error.

Why this happens

Verified duplicate risk checked against covered-errors ("Vercel build command failed" is generic, not case-specific). This is a distinct variant: case-insensitive local FS (Windows/macOS) vs case-sensitive Vercel Linux build env causes 'Module not found' even when paths look correct. Persistent community issue (#69390 vercel/next.js). Category: Deployment (Vercel exact match).

Common causes

  • Verified duplicate risk checked against covered-errors ("Vercel build command failed" is generic, not case-specific). This is a distinct variant: case-insensitive local FS (Windows/macOS) vs case-sensitive Vercel Linux build env causes 'Module not found' even when paths look correct. Persistent community issue (#69390 vercel/next.js). Category: Deployment (Vercel exact match).

Quick fixes

  1. Confirm the exact error signature matches Module not found: Can't resolve '@/components/forms/RegisterForm' — Error: Command "npm run build" exited with 1.
  2. Check the Vercel account, local tool state, and provider configuration involved in the failing workflow.
  3. Check the build output, project root, and deployment platform configuration before redeploying.

Platform/tool-specific checks

  • Verify the command, editor, extension, or API client that produced the error.
  • Compare local settings with CI, deployment, or editor-level settings when the error appears in only one environment.
  • Avoid deleting credentials, local model data, or project settings until the failing scope is clear.

Step-by-step troubleshooting

  1. Capture the exact error message and the command, editor action, or request that triggered it.
  2. Check whether the failure is account/auth, quota/rate, model/provider, local runtime, or deployment configuration.
  3. Review the source evidence below and compare it with your environment.
  4. Apply one change at a time and rerun the smallest failing action.
  5. Keep the working fix documented for the team or deployment environment.

How to prevent it

  • Keep provider/tool configuration documented.
  • Record non-secret diagnostics such as tool version, provider name, model name, and command path.
  • Add a lightweight check before CI or production workflows depend on the tool.