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.

Costea Adrian Costea Adrian Embedded Engineer specilizing in perception systems. Latest project was a adas camera calibration system. rayush33 rayush33 JavaScript (React.js, React Native, Node.js) Developer with demonstrated industry experience of 4+ years, actively looking for opportunities to hone my skills as well as help small-scale business owners with solutions to technical problems Milan Surelia Milan Surelia Milan Surelia is a Mobile App Developer with 5+ years of experience crafting scalable, cross-platform apps at 7Span and Meticha. At 7Span, he engineers feature-rich Flutter apps with smooth performance and modern UI. As the Co-Founder of Meticha, he builds open-source tools and developer-focused products that solve real-world problems. Expertise: 💡 Developing cross-platform apps using Flutter, Dart, and Jetpack Compose for Android, iOS, and Web. 🖋️ Sharing insights through technical writing, blogging, and open-source contributions. 🤝 Collaborating closely with designers, PMs, and developers to build seamless mobile experiences. Notable Achievements: 🎯 Revamped the Vepaar app into Vepaar Store & CRM with a 2x performance boost and smoother UX. 🚀 Launched Compose101 — a Jetpack Compose starter kit to speed up Android development. 🌟 Open source contributions on Github & StackOverflow for Flutter & Dart 🎖️ Worked on improving app performance and user experience with smart solutions. Milan is always happy to connect, work on new ideas, and explore the latest in technology. Richard McSorley Richard McSorley Full-Stack Software Engineer with 8+ years building high-performance applications for enterprise clients. Shipped production systems at Walmart (4,000+ stores), Cigna (20M+ users), and Arkansas Blue Cross. 5 patents in retail/supply chain tech. Currently focused on AI integrations, automation tools, and TypeScript-first architectures. Stanislav Prigodich Stanislav Prigodich 15+ years building iOS and web apps at startups and enterprise companies. I want to use that experience to help builders ship real products - when something breaks, I'm here to fix it. Dor Yaloz Dor Yaloz SW engineer with 6+ years of experience, I worked with React/Node/Python did projects with React+Capacitor.js for ios Supabase expert AUXLE AUXLE I am a Full Stack Developer experienced in building Websites, Web apps and Cross Platform Mobile Apps for Startups and Companies. Vlad Temian Vlad Temian 15+ years shipping production infrastructure for startups. Former CTO at qed.builders (acquired by The Sandbox). Cursor ambassador and agentic tooling builder. I've scaled systems, automated deployments, and built observability tools for AI coding workflows. I specialize in taking vibe-coded apps from broken prototype to production-ready: fixing Supabase auth/RLS, Stripe integrations, deployment pipelines, and cleaning up AI-generated spaghetti. I build tools in this space (agentprobe, claudebin, micode) and understand both sides: how AI generates code and why it breaks. https://blog.vtemian.com/ Omar Faruk Omar Faruk As a Product Engineer at Klasio, I contributed to end-to-end product development, focusing on scalability, performance, and user experience. My work spanned building and refining core features, developing dynamic website templates, integrating secure and reliable payment gateways, and optimizing the overall system architecture. I played a key role in creating a scalable and maintainable platform to support educators and learners globally. I'm enthusiastic about embracing new challenges and making meaningful contributions. Victor Denisov Victor Denisov Developer

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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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