StackHeal

The zero-bloat, edge-deployed troubleshooting hub. Immediate pure-code cures for modern deployment, SSR, and framework errors.

Fix: CORS Access-Control-Allow-Origin in Vercel

Immediate zero-dependency cure for CORS preflight errors and failed OPTIONS requests in Vercel Serverless and Edge deployments.

VercelCORSServerless

Fix: ReferenceError: window is not defined

Resolve fatal ReferenceErrors caused by accessing browser APIs (localStorage, navigator) during Next.js Server-Side Rendering (SSR).

Next.jsSSRReact

Fix: Hydration failed because the initial UI does not match

Use a custom useMounted hook to solve strict React 18 hydration mismatches between server-generated HTML and client UI.

Next.jsHydrationReact 18

Fix: 404 Not Found on direct URLs in Vercel (SPA)

Configure vercel.json routing to prevent hard 404s and MIME type errors when refreshing Single Page Applications (React/Vite).

VercelViteSPA Routing

Fix: Module not found 'fs' in Next.js Edge Runtime

Switch runtime configurations to fix fatal build errors when trying to use Node.js core modules inside Edge environments.

Next.jsEdge RuntimeNode.js

Fix: 504 Gateway Timeout in Vercel Serverless

Extend execution limits for long-running AI scripts and heavy database queries using maxDuration and vercel.json.

Vercel504 TimeoutNext.js

Fix: createContext only works in Client Components

Master the boundary pattern to safely implement Redux, Theme Providers, and Context inside Next.js 13+ App Router layouts.

Next.js App RouterReact Context

Fix: Invalid src prop on next/image (Hostname)

Update remotePatterns in next.config.js to authorize external domains and fix next/image Unhandled Runtime Errors.

Next.jsnext/imageConfig

Fix: Functions cannot be passed to Client Components

Cure complex serialization errors by correctly utilizing "use server" Server Actions or moving interaction logic to the client.

Next.jsServer ActionsReact

Fix: Prisma P2024 Connection Pool Timeout

Prevent serverless exhaustion by configuring transaction pooling URLs and creating global singletons for PrismaClient.

PrismaPostgreSQLVercel

Fix: Dynamic server usage statically rendered

Resolve static build bailouts caused by headers(), cookies(), or searchParams by using Suspense boundaries and force-dynamic.

Next.jsBuild ErrorSuspense

Fix: Warning: Extra attributes from the server

Use suppressHydrationWarning to prevent browser extensions (like Grammarly) from throwing console errors in Next.js.

Next.jsHydrationReact

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