Common Issues deployment

App Shows a Blank White Page After Deploy

You deployed your app and instead of seeing your application, you get a completely blank white page. No errors visible on the page itself — just white nothing.

Error Messages You Might See

Uncaught TypeError: Cannot read properties of undefined ChunkLoadError: Loading chunk failed Mixed Content: The page was loaded over HTTPS but requested an insecure resource
Uncaught TypeError: Cannot read properties of undefinedChunkLoadError: Loading chunk failedMixed Content: The page was loaded over HTTPS but requested an insecure resource

Common Causes

  • JavaScript build errors that prevent the app from rendering
  • Wrong base path or public URL configuration
  • Missing index.html or incorrect build output directory
  • HTTPS/HTTP mismatch causing mixed content blocking
  • API calls failing silently, preventing the UI from loading

How to Fix It

  1. Open browser console (F12 > Console) — there will almost certainly be errors there
  2. Check if the correct build output directory is configured in your deploy settings
  3. Look for mixed content warnings (HTTP resources on an HTTPS page)
  4. Verify that your app's homepage/base URL is set correctly for production
  5. Try a hard refresh (Ctrl+Shift+R or Cmd+Shift+R) to clear cached assets

Real developers can help you.

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Antriksh Narang Antriksh Narang 5 years+ Experienced Dev (Specially in Web Development), can help in python, javascript, react, next.js and full stack web dev technologies. Jared Hasson Jared Hasson Full time lead founding dev at a cyber security saas startup, with 10 yoe and a bachelor's in CS. Building & debugging software products is what I've spent my time on for forever Jacek Rozanski Jacek Rozanski Senior PHP/Symfony developer and DevOps engineer with 20+ years of professional experience, running opcode.pl (web development agency, est. 2004). Day job: I'm the sole backend developer at merketing company where I own and maintain 11 PHP/Symfony microservices on AWS (ECS Fargate, RDS, S3, CloudFront), handle the full CI/CD pipeline (Bitbucket Pipelines, Docker), and manage monitoring with Sentry and CloudWatch. These services handle high request volumes in production every month. 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Frequently Asked Questions

The page is blank but there are no visible errors. Where do I look?

Open browser developer tools (F12) and check the Console tab. There are almost always JavaScript errors there even when the page appears blank.

It worked yesterday and now it's blank. What changed?

Check your recent commits or deploys. A broken import, missing env var, or updated dependency is usually the cause.

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