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Fixes for common vibe-coded app errors
Paste the error, find the fix. Each guide has the exact cause, steps, code, and a prompt you can give your AI tool.
Firebase · Security rules
Fix "Your Cloud Firestore database has insecure rules" (Firebase email)
Your Cloud Firestore database has insecure rules
Fix Stripe webhook "No signatures found matching the expected signature for payload"
No signatures found matching the expected signature for payload
Fix Supabase Edge Function "blocked by CORS policy" (preflight)
has been blocked by CORS policy: Response to preflight request doesn't pass access control check
Fix "new row violates row-level security policy for table" (Supabase)
new row violates row-level security policy for table
Fix "404: NOT_FOUND" on refresh in a React/Vite app on Vercel
404: NOT_FOUND
Fix "Module not found: Can't resolve" on Vercel (works locally)
Module not found: Can't resolve