Base44 auth not working — fix login issues after export
Base44 auth not working — fix login issues after export
Base44 builds apps with its own hosted infrastructure. When you export the code or move to a custom deployment, the auth configuration that worked inside Base44’s platform doesn’t automatically follow. OAuth redirect URLs, session configuration, and database connections all need to be reconfigured for your new host.
Quick fix for Base44 auth not working — fix
Fix 1 — Audit auth dependencies
Check what auth library the exported code uses. If it references Base44-specific auth providers or environment variables, you’ll need to replace them with a standard library like Supabase Auth, Clerk, or NextAuth. Grep the codebase for @base44, BASE44_, and base44.app to find every reference.
Deeper fixes when the quick fix fails
- 02
Fix 2 — Set up new auth provider
For Supabase Auth: create a Supabase project, enable the auth providers you need (email/password, Google, GitHub), add your production URL to redirect URLs, and update environment variables in your deployment. Replace Base44’s auth SDK calls with the new provider’s equivalent (sign in, sign out, session read).
- 03
Fix 3 — Update OAuth callback URLs
In each OAuth provider’s settings (Google Cloud Console, GitHub Developer Settings): add your new production URL as an authorised redirect URI. Remove any Base44-specific callback URLs. The callback path must match your new auth provider’s route (for Supabase, that’s usually
/auth/callback). - 04
Fix 4 — Test the complete auth flow
In an incognito window on the production URL: test sign up, verify email, sign in, sign out, password reset. Check that sessions persist across page reloads and that users can only access their own data. Repeat with a second account to confirm no cross-user data leakage.
After it works
Delete every remaining reference to Base44 from your codebase — stale imports, unused env vars, old callback URLs in your OAuth provider. If any data was synced from Base44’s database, verify the user IDs line up with your new auth provider’s user IDs. Mismatched IDs are the most common cause of “user logged in but dashboard is empty”.
Why AI-built apps hit Base44 auth not working — fix
Base44’s platform manages authentication infrastructure internally. Exported code references Base44-specific auth providers or environment variables that aren’t available outside the platform.
The symptom depends on which layer fails first: imports that don’t resolve, OAuth that redirects to a Base44 callback URL instead of yours, or session middleware looking for an env var that only existed inside Base44’s runtime.
“Everything worked perfectly in Base44 but login is completely broken after I exported.”
Diagnose Base44 auth not working — fix by failure mode
Work top-down through the four layers; the first failure usually explains the rest.
| Symptom | Cause | Fix |
|---|---|---|
| Build fails: 'Cannot find module @base44/auth' | Exported code imports Base44-internal SDK | Fix 1 |
| OAuth redirects to a base44.app URL | Callback URLs still point at Base44 infrastructure | Fix 3 |
| Runtime: 'process.env.BASE44_AUTH_SECRET undefined' | Env vars only existed inside Base44's runtime | Fix 2 |
| Login succeeds but user data is empty / mixed | Database connection + RLS not reconfigured | Fix 2 |
Related errors we fix
Still stuck with Base44 auth not working — fix?
If you’ve exported from Base44 and can’t get auth working on your new host, we migrate the full auth layer:
- →You've exported from Base44 and login is broken
- →OAuth still redirects to base44.app URLs
- →You need to migrate existing users, not start over
- →You want a secure, production-ready auth layer with RLS
Base44 auth not working — fix questions
Why does Base44 auth stop working after export?+
Which auth provider should I use to replace Base44 auth?+
Can I migrate my existing Base44 users without forcing them to re-register?+
My OAuth still redirects to a base44.app URL. How do I stop it?+
How do I know if my new auth setup is secure?+
How much does migrating Base44 auth cost?+
Ship the fix. Keep the fix.
Emergency Triage restores service in 48 hours. Break the Fix Loop rebuilds CI so this error cannot ship again.
Hyder Shah leads Afterbuild Labs, shipping production rescues for apps built in Lovable, Bolt.new, Cursor, Replit, v0, and Base44. our rescue methodology.
Base44 auth not working — fix experts
If this problem keeps coming back, you probably need ongoing expertise in the underlying stack.
- Auth specialist →Migrate Base44-abstracted auth to Supabase, Clerk, or NextAuth without forcing users to re-register.
- Supabase expert →Set up Supabase Auth + Postgres + RLS for an exported Base44 codebase and migrate existing users.
- Next.js migration expert →Move a Base44 export to Next.js on Vercel with working auth, routing, and environment configuration.