How to Fix Node.js ERR_MODULE_NOT_FOUND in ES Modules
Node.js cannot find a local module or dependency? Learn the differences between ES module resolution, file extensions, package exports, and TypeScript runtime paths.
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Insights on Building, Designing and Growing Online.
Practical articles on web development, design, search, marketing and AI, plus our development troubleshooting archive. Each troubleshooting guide shows the evidence status of its published version.
Troubleshooting topics
19 articles
Fix Node.js EADDRINUSE: Port 3000 Already in Use on Windows
Is your development server failing because port 3000 is already in use? Find its owning process, avoid stopping unrelated apps, and move your server to a free port.
Fix Next.js Image Hostname Not Configured Error
Getting an "Invalid src prop" error when displaying external images in Next.js? Learn how to configure remote Patterns, troubleshoot CDN URLs, and fix image loading without weakening security.
How to Fix Git “Detected Dubious Ownership” on Windows & WSL
Git refuses to run and reports a dubious ownership error? Learn how to inspect the repository owner, trust a specific directory, and troubleshoot Windows and WSL safely.
How to Fix npm ERESOLVE Dependency Errors
Getting npm ERR! ERESOLVE unable to resolve dependency tree? Learn how to identify conflicting packages, fix peer dependencies, and avoid risky install flags.
How to Fix Supabase 403 Forbidden Errors
Getting 403 Forbidden or permission denied in Supabase? Learn how to diagnose error 42501, fix missing table grants, review RLS policies, and test access safely.
Fix npm.ps1 Cannot Be Loaded on Windows (2026 Guide)
Getting "npm.ps1 cannot be loaded because running scripts is disabled" on Windows? Learn safe fixes using npm.cmd, PowerShell execution policies, and VS Code.
Next.js Environment Variables Not Working? 9 Fixes
Fix undefined environment variables in Next.js. Learn how .env.local, NEXT_PUBLIC_, Server Components, build-time values, and Vercel settings work.
How to Fix Next.js Hydration Errors (2026 Guide)
Fix Next.js hydration errors caused by server-client mismatches, browser APIs, dates, random values, and invalid HTML with practical code examples.