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Plain-English fixes for the most common Lovable, Cursor, Supabase, Vercel and Next.js errors.

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Browse by platform: Next.js · Vercel · Supabase · Stripe · Cursor · Lovable · Bolt · Replit

• Next.jsHydration failed because the initial UI does not match what was rendered on the server
• Next.jsText content does not match server-rendered HTML
• Next.jsReferenceError: window is not defined
• Next.jsYou're importing a component that needs useState. It only works in a Client Component
• Next.jsasync/await is not yet supported in Client Components
• Next.jsModule not found: Can't resolve '...'
• Next.jsInvalid src prop on next/image, hostname is not configured
• Next.jsDynamic server usage: Route couldn't be rendered statically
• Next.jsEnvironment variable is undefined in the browser
• VercelCommand "npm run build" exited with 1
• VercelWorks locally but fails on Vercel
• VercelFUNCTION_INVOCATION_TIMEOUT (504)
• VercelFUNCTION_INVOCATION_FAILED (500)
• Vercel404: NOT_FOUND on Vercel
• Vercelnpm ERR! ERESOLVE unable to resolve dependency tree
• Supabasenew row violates row-level security policy for table
• SupabaseSupabase select returns an empty array (no error)
• SupabaseInvalid JWT / JWT expired
• SupabasesupabaseUrl is required
• Supabaserelation "public.x" does not exist
• SupabaseCould not find the column in the schema cache
• SupabaseEmail rate limit exceeded
• SupabaseTypeError: Failed to fetch (Supabase Edge Function / CORS)
• CursorCursor: model is overloaded / slow requests
• CursorCursor agent keeps making the same failed edit
• LovableLovable app shows a blank white page after deploying elsewhere
• LovableLovable/Vite: Failed to resolve import
• StripeNo signatures found matching the expected signature for payload
• StripeInvalid API Key provided
• StripeYou did not provide an API key
• StripeNo such customer: 'cus_...'
• StripeYour card was declined
• StripeAmount must be at least $0.50 usd
• Cursorcursor: command not found
• CursorExtension host terminated unexpectedly
• CursorCursor: Connection failed. Check your internet connection or VPN
• LovableTypeError: Cannot read properties of undefined (reading 'map')
• LovableEdge Function returned a non-2xx status code
• LovableUnexpected token '<', "<!DOCTYPE "... is not valid JSON
• BoltFailed to parse source for import analysis because the content contains invalid JS syntax
• BoltThe requested module does not provide an export named
• BoltToo many re-renders. React limits the number of renders to prevent an infinite loop
• ReplitError: listen EADDRINUSE: address already in use
• ReplitError: Cannot find module 'express'
• ReplitModuleNotFoundError: No module named 'flask'
• SupabaseAuthApiError: Invalid login credentials
• SupabaseAuthApiError: Email not confirmed
• Next.jsObjects are not valid as a React child
• Next.jsuseSearchParams() should be wrapped in a suspense boundary
• VercelNo Output Directory named "dist" found after the Build completed
• CursorHigh Load: We're experiencing high demand for this model
• BoltRangeError: WebAssembly.instantiate(): Out of memory
• ReplitApplication failed to respond
• StripeThis customer has no attached payment source or default payment method
• BoltThis project exceeds the total supported prompt size
• LovableTypeError: Failed to fetch dynamically imported module
• StripeNo such price: 'price_...'
• SupabaseRLS Disabled in Public: Table is public, but RLS has not been enabled
• CursorYour request has been blocked as our system has detected suspicious activity from your account
• StripeWebhook payload must be provided as a string or a Buffer instance representing the _raw_ request body
• LovableuseNavigate() may be used only in the context of a <Router> component
• BoltIt looks like you're trying to use tailwindcss directly as a PostCSS plugin
• StripeYou must provide at least one recurring price in `subscription` mode when using prices
• LovableAuthApiError: Database error saving new user
• CursorYour conversation is too long. Please try creating a new conversation or shortening your messages.
• Supabasepermission denied for table (Data API 42501)
• LovableLovable / OpenAI model retired or deprecated: retirement dates and replacements