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.

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. Kingsley Omage Kingsley Omage Fullstack software engineer passionate about AI Agents, blockchain, LLMs. Matthew Jordan Matthew Jordan I've been working at a large software company named Kainos for 2 years, and mainly specialise in Platform Engineering. I regularly enjoy working on software products outside of work, and I'm a huge fan of game development using Unity. I personally enjoy Python & C# in my spare time, but I also specialise in multiple different platform-related technologies from my day job. Victor Denisov Victor Denisov Developer Pratik Pratik SWE with 15+ years of experience building and maintaining web apps and extensive BE infrastructure Caio Rodrigues Caio Rodrigues I'm a full-stack developer focused on building practical and scalable web applications. My main experience is with **React, TypeScript, and modern frontend architectures**, where I prioritize clean code, component reusability, and maintainable project structures. I have strong experience working with **dynamic forms, state management (Redux / React Hook Form), and complex data-driven interfaces**. I enjoy solving real-world problems by turning ideas into reliable software that companies can actually use in their daily operations. Beyond coding, I care about **software quality and architecture**, following best practices for componentization, code organization, and performance optimization. I'm also comfortable working across the stack when needed, integrating APIs, handling business logic, and helping transform prototypes into production-ready systems. My goal is always to deliver solutions that are **simple, efficient, and genuinely useful for the people using them.** Sage Fulcher Sage Fulcher Hey I'm Sage! Im a Boston area software engineer who grew up in South Florida. Ive worked at a ton of cool places like a telehealth kidney care startup that took part in a billion dollar merger (Cricket health/Interwell health), a boutique design agency where I got to work on a ton of exciting startups including a photography education app, a collegiate Esports league and more (Philosophie), a data analytics as a service startup in Cambridge (MA) as well as at Phillips and MIT Lincoln Lab where I designed and developed novel network security visualizations and analytics. I've been writing code and furiously devoted to using computers to make people’s lives easier for about 17 years. My degree is in making computers make pretty lights and sounds. Outside of work I love hip hop, the Celtics, professional wrestling, magic the gathering, photography, drumming, and guitars (both making and playing them) 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. prajwalfullstack prajwalfullstack Hi Im a full stack developer, a vibe coded MVP to Market ready product, I'm here to help Daniel Vázquez Daniel Vázquez Software Engineer with over 10 years of experience on Startups, Government, big tech industry & consulting.

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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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