Base44 App Not Loading After Publishing
Your Base44 app works perfectly in the editor and preview mode, but after publishing it to a live URL, the app doesn't load. Users see a blank page, a loading spinner that never resolves, or an error message.
This is a common and stressful issue because the app appeared to be fully functional during development. The disconnect between the editor environment and the published environment can be caused by several factors related to how Base44 builds and deploys apps.
In some cases, the app partially loads (the layout appears but data doesn't populate), or certain pages work while others don't.
Error Messages You Might See
Common Causes
- The publish process completed with warnings that were overlooked, resulting in a partially built app
- Environment-specific settings (API keys, database connections) differ between preview and production
- JavaScript errors in custom code or components that only manifest in the production build
- The app references assets or resources that are available in the editor but not included in the published build
- A recent change introduced an error that breaks the production build but not the editor preview
How to Fix It
Check the publish logs in your Base44 dashboard for any warnings or errors that occurred during the build process. Even warnings can indicate issues that cause the published app to malfunction.
Open the published app in a browser with the developer console open (F12). JavaScript errors in the console often point directly to the failing component or configuration.
Try re-publishing the app after reverting your most recent changes. If the previous version worked, compare what changed. For persistent deployment failures, a developer can examine the build output and production environment configuration.
Real developers can help you.
Basel Issmail
’m a Senior Full-Stack Developer and Tech Lead with experience designing and building scalable web platforms. I work across the full development lifecycle, from translating business requirements into technical architecture to delivering reliable production systems.
My work focuses on modern web technologies, including TypeScript, Angular, Node.js, and cloud-based architectures. I enjoy solving complex technical problems and helping teams turn product ideas and prototypes into working platforms that can grow and scale.
In addition to development, I often collaborate closely with product managers, business analysts, designers, and QA teams to ensure that solutions align with both technical and business goals.
I enjoy working with startups and product teams where I can contribute both as a hands-on engineer and as a technical partner in designing and delivering impactful software.
Matthew Butler
Systems Development Engineer @ Amazon Web Services
Alvin Voo
I’ve watched the tech landscape evolve over the last decade—from the structured days of Java Server Pages to the current "wild west" of Agentic-driven development. While AI can "vibe" a frontend into existence, I specialize in the architecture that keeps it from collapsing.
My expertise lies in the critical backend infrastructure: the parts that must be fast, secure, and scalable. I thrive on high-pressure environments, such as when I had only three weeks to architect and launch an Ethereum redemption system with minimal prior crypto knowledge, turning it into a major revenue stream.
What I bring to your project:
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Sanity in the Age of AI: I bridge the gap between "best practices" and modern speed, ensuring your project isn't just built fast, but built to last.
Pratik
SWE with 15+ years of experience building and maintaining web apps and extensive BE infrastructure
Rudra Bhikadiya
I build and fix web apps across Next.js, Node.js, and DBs.
Comfortable jumping into messy code, broken APIs, and mysterious bugs.
If your project works in theory but not in reality, I help close that gap.
Jaime Orts-Caroff
I'm a Senior Android developer, open to work in various fields
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.
Daniel Vázquez
Software Engineer with over 10 years of experience on Startups, Government, big tech industry & consulting.
ISHANTDEEP SINGH
Senior Software Engineer with 7+ years of experience in React, JavaScript, TypeScript, Next.js, and Node.js. I’ve also worked as a tech lead for startups, owning end-to-end technical execution including architecture, development, scaling, and delivery. I bring a strong mix of hands-on coding, product thinking, and technical leadership, and I’m comfortable building products from scratch as well as improving and scaling existing systems.
Anthony Akpan
Developer with 8 years of experience building softwares fro startups
You don't need to be technical. Just describe what's wrong and a verified developer will handle the rest.
Get HelpFrequently Asked Questions
Why does my Base44 app work in preview but not when published?
The published version uses a different build process and environment. Check the publish logs for errors and open the browser developer console on the published URL for JavaScript errors.
How do I fix a Base44 app that shows a blank page after publishing?
Open the browser developer console to see error messages. Common causes include missing environment settings or JavaScript errors in custom code that only appear in production builds.
Can I roll back a Base44 deployment?
Check if Base44 offers version history or a way to re-publish a previous version. If not, revert your recent changes in the editor and re-publish.