56 troubleshooting guides
Lovable Errors and Fixes
Step-by-step fixes for the most common Lovable build, auth, deploy, and integration problems.
Quick Answer
How do I fix common Lovable errors?
Start with the exact symptom, then verify environment variables, auth redirects, and integration setup before changing code. These 56 Lovable fixes are grouped so you can go straight to the failing workflow.
Use this hub when
- What this answers
- Which Lovable failure you are actually dealing with, and which fix page to read first.
- Good for
- Auth bugs, deploy failures, stale state, integrations, and billing issues.
- Updated
- Continuously as fixes are added
If this keeps happening
Do not let repeated Lovable fixes turn into a longer stack mistake
Use these next clicks when the issue is no longer just one bug. They are the faster paths when Lovable keeps creating the same class of problem.
Lovable reviews
Open this when the same full-stack MVP failures keep repeating and you need a harder answer on whether Lovable is still the right bet.
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Cursor review
Open this when the pattern behind the bug is really about generated speed versus owning more of the stack in code.
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Deploy hub
Open this when the fix is exposing a bigger production handoff problem, not just one broken feature.
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Tool picker
Open this when the repeated bug is making you question the whole stack choice instead of the latest patch.
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Firecrawl review
Open this when the app also needs live web data and the next stack decision is no longer only about the builder itself.
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Featured Lovable fixes
Lovable App Takes 3-5 Seconds to Load
Pages take 3-5 seconds to load
Lovable App Shows a Blank Screen After Deploy
Works in Lovable preview
Why Does Lovable Keep Changing Things I Didn't Ask For?
Asked to change button color, whole layout changed
Lovable Form Submits but Supabase Saves Nothing
Form submits successfully but data doesn't appear in Supabase
Lovable Login Works in Preview but Fails on the Live URL
Login works in preview but fails on the live URL
Lovable Stripe Checkout Fails or Cards Are Declined
Payment form shows but card is declined
All Lovable fixes
Lovable App Takes 3-5 Seconds to Load
Pages take 3-5 seconds to load
Lovable App Shows a Blank Screen After Deploy
Works in Lovable preview
Why Does Lovable Keep Changing Things I Didn't Ask For?
Asked to change button color, whole layout changed
Lovable Form Submits but Supabase Saves Nothing
Form submits successfully but data doesn't appear in Supabase
Lovable Login Works in Preview but Fails on the Live URL
Login works in preview but fails on the live URL
Lovable Stripe Checkout Fails or Cards Are Declined
Payment form shows but card is declined
Lovable Looks Fine on Desktop but Breaks on Mobile
Desktop looks fine, mobile is broken
Lovable Vercel Build Failed
Vercel shows red X on deployment
Lovable Images Work in Preview but Break After Deploy
Broken image icons showing
Why Are My Lovable Credits Running Out So Fast?
Used all monthly credits in a few days
Stripe Checkout Succeeds but Lovable Never Unlocks Access
Checkout succeeds but access is never updated
Stripe Shows Active but Lovable Still Blocks Access
Stripe shows the subscription as active
Stripe Payment Succeeded but the UI Still Looks Locked
Checkout succeeds but the dashboard still says free plan
A User Cancelled Stripe but Still Has Access in the App
A cancelled user still sees premium features
Stripe Upgrade Worked but Lovable Still Shows the Old Plan
User upgraded but still sees old limits
A Stripe Customer Is Linked to the Wrong User
One user gets another user's access
A Cancelled Stripe Subscription Still Has Access in a Lovable App
A user cancelled but still has premium access
A Lovable Password Reset Link Goes to the Preview URL Instead of Production
Reset password emails send users to a preview URL
A Lovable Role Check Exists Only in the UI
Admin buttons are hidden but direct URLs still work
A Public Storage Bucket Is Exposing User Files in a Lovable App
User-uploaded files can be opened by anyone with the URL
A Supabase Read Policy Is Too Broad in a Lovable App
Authenticated users can read more rows than they should
Lovable Supabase Auth Not Working
Users cannot sign in even though the form looks correct
Supabase RLS Is Exposing User Data in a Lovable App
One user can read another user's rows
Users Can Access Paid Features Without Paying in a Lovable App
Premium features unlock without a confirmed Stripe payment
A Secret API Key Is Exposed in the Frontend of a Lovable App
You can see a secret key in the browser source or network tab
Supabase Storage Bucket Is Public by Mistake in a Lovable App
Private uploads open to anyone with the URL
An Admin Endpoint Is Exposed in a Lovable App
An /api/admin or /admin action works without a proper role check
A Supabase Service-Role Key Is Exposed in a Lovable App
The browser bundle includes a service_role key
Anonymous Inserts Are Too Open in a Lovable App
Spam or junk rows flood a public form table
Stripe Webhook Replay or Duplicate Events Are Double-Applying Changes
Credits are added twice after one payment
An Admin Dashboard Is Indexed by Google in a Lovable App
An /admin page appears in Google results
Lovable Credits Burning Too Fast
Credits disappear after a handful of prompts
Dark Mode Not Working in Lovable App
Dark mode toggle doesn't change anything
Lovable Form Submits but No Email Ever Arrives
Form submits to the database but no email notification arrives
Lovable Pages Return 404 on Direct URL
Home page works
Lovable Supabase Schema Error
Error: column X does not exist
Lovable App Database Queries Are Slow
Pages with data take 3+ seconds to load
TypeScript Errors in Lovable App
Red underlines in Lovable editor
CSS Changes Not Showing in Lovable
Changed a class but nothing looks different
Lovable App Hitting API Rate Limits
External API returns 429 Too Many Requests
File Upload Not Working in Lovable
Upload button does nothing
Search Feature Not Working in Lovable App
Search returns no results
Lovable Checkout Button Throws a Stripe Session 400 Error
The checkout button throws a 400 error
Stripe Webhook Returns 200 but Lovable Access Still Does Not Change
Stripe says the webhook succeeded but the user still has no access
Lovable Supabase RLS Blocking Inserts
Form submits in Lovable but no row appears in Supabase
Lovable Supabase Auth Session Missing After Refresh
User signs in successfully, then gets logged out on refresh
Lovable Supabase Storage Upload Failing
File picker works but the upload fails
Lovable Stripe Checkout Session Returning 400
Stripe checkout creation fails with a 400 error
Lovable Stripe Webhook Not Updating Access
Payment succeeds but the user never gets access
Lovable Stripe Billing Portal Return URL Broken
Stripe Billing Portal opens but returns to a broken page
Lovable Clerk Middleware Redirect Loop
The app keeps bouncing between login and dashboard
Lovable Clerk Production Domain Not Authorized
Authentication works locally but not on the live domain
Lovable Clerk Session Missing After Refresh
The user appears signed out after a refresh
Lovable Resend API Key Missing in Production
Emails work locally but not after deploy
Lovable Form Submits but No Email Ever Arrives
I filled the form but no email arrived
Lovable Resend Emails Going To Spam On Launch
Emails are sent, but they land in spam