Question 1

Why is Lovable not working?

Accepted Answer

Usually it's not Lovable itself but one specific failure — a build error, a stuck message, a Supabase hiccup, or a browser issue. Diagnose in order rather than guessing.

Question 2

Why is my Lovable project stuck?

Accepted Answer

A stuck project usually means a message is still processing, a build failed silently, or you're in a fix loop. Check the chat status, the build/error banner, and version history before assuming it's frozen.

Question 3

Why is Lovable chat stuck loading?

Accepted Answer

Chat usually gets stuck loading due to a network blip, a very large/complex request, or a backend timeout. Refresh first, then check the console before resending the same prompt.

Question 4

Why is my Lovable preview blank?

Accepted Answer

A blank preview almost always means a JavaScript error is stopping the app from rendering. Open the browser console to find the exact error, then ask Lovable to fix it.

Question 5

How do I fix a white screen in Lovable?

Accepted Answer

A white screen is a rendering crash — check the browser console for the error, paste it back to Lovable verbatim, and revert to a working version if repeated fixes don't clear it.

Question 6

Why did Lovable break my website?

Accepted Answer

Something in a recent prompt likely had a side effect on shared code, styles or data. Check version history to see exactly what changed, then decide whether to revert or fix forward.

Question 7

How do I undo Lovable changes?

Accepted Answer

Open Version history, find the last version before things went wrong, and revert to it — this restores the whole project to that exact state.

Question 8

How do I fix a Lovable build error?

Accepted Answer

Read the exact error message and file it points to, paste it back to Lovable, and let it fix that specific error rather than describing the symptom vaguely.

Question 9

Why does Lovable keep saying "try to fix"?

Accepted Answer

That prompt means Lovable's own fix attempt didn't fully resolve the error and it's suggesting another pass. If it repeats several times, stop and change approach rather than keep clicking it.

Question 10

Why can't Lovable fix an error?

Accepted Answer

Usually because the prompt only describes the symptom, not the actual error text, or the root cause is outside the code Lovable can see (a third-party service, secret, or data issue).

Question 11

How do I stop Lovable getting stuck in a fix loop?

Accepted Answer

Stop clicking automatic fixes, switch to Plan mode to find the actual root cause, and if that fails, revert to the last stable version instead of continuing to patch.

Question 12

Why did fixing one thing break another?

Accepted Answer

Shared code — layouts, components, hooks, RLS policies — often affects more than the page you're focused on, so a targeted fix can have side effects elsewhere. Scope prompts narrowly and check related pages after each fix.

Question 13

Why does my app work in preview but not when published?

Accepted Answer

Preview and the published site can differ due to environment variables, caching, or build-time settings that only apply to one environment. Check environment/secret configuration and hard-refresh the published URL before assuming it's a Lovable bug.

Question 14

Why does my app work for me but not other users?

Accepted Answer

This is almost always a permissions or role issue — check Row-Level Security policies and the user_roles table rather than the front-end code, since it's usually about who's allowed to read/write data, not a bug.

Question 15

Why am I getting a 403 error?

Accepted Answer

A 403 means the request was understood but denied — almost always a permissions or Row-Level Security issue rather than a bug in the request itself. Check who's making the request and what policy should allow it.

Question 16

Why am I getting a 404 error?

Accepted Answer

A 404 means the thing being requested doesn't exist at that path — check for a broken route, a renamed page, a missing database row, or a wrong API endpoint.

Question 17

Why am I getting "Failed to Fetch"?

Accepted Answer

"Failed to fetch" means the browser couldn't complete a network request at all — usually CORS, a down endpoint, a missing/invalid API key, or no internet connection, rather than a code logic error.

Question 18

Why am I getting CORS errors?

Accepted Answer

CORS errors happen when your app's domain tries to call an API that hasn't explicitly allowed it. Fix it on the server side — either by adding your domain to the API's allow-list or by routing the call through a server function.

Question 19

Why are environment variables missing?

Accepted Answer

Environment variables/secrets are usually missing because they were set for one environment (preview) but not another (production), never entered at all, or referenced with the wrong name in code. Ask Lovable to check what's configured rather than guessing.

Question 20

Why has Supabase stopped connecting?

Accepted Answer

Usually an expired/rotated key, a paused free-tier project, an RLS policy change, or a genuine outage. Check the connection status and error message in Lovable before assuming your code broke.

Question 21

Why is authentication suddenly broken?

Accepted Answer

Auth usually breaks after a schema change, an RLS policy edit, or an expired/misconfigured provider setting — check Logs first, then ask Lovable to diagnose before fixing.

Question 22

Why did my database stop working?

Accepted Answer

A stopped database usually means a broken RLS policy, a failed migration, or (rarely) a paused/disconnected Supabase project — check Logs and ask Lovable to diagnose before changing anything.

Question 23

Why is my custom domain offline?

Accepted Answer

Custom domains usually go offline because of a missing or changed DNS record, a certificate that hasn't issued yet, or the registrar's records pointing somewhere else — recheck the domain settings and your DNS provider.

Question 24

Why won't my Lovable project publish?

Accepted Answer

Publishing usually fails because of a build error, an unresolved dependency, or a backend function that errors at build time — check the build log Lovable shows and fix that specific error first.

Question 25

Why are Lovable builds failing?

Accepted Answer

Builds usually fail from a syntax/type error, a broken import, or a server function that errors during the build's checks — copy the exact error into your next prompt rather than asking Lovable to guess.

Question 26

Why aren't my changes showing?

Accepted Answer

Usually a stale preview cache, an unsaved/unpublished change, or you're looking at the live site instead of Preview — hard-refresh, confirm the chat finished, and republish if needed.

Question 27

How do I read Lovable console errors?

Accepted Answer

Open the browser console or Lovable's Logs panel, find the first error (later ones are often side effects), and paste the exact message and file/line into your next prompt.

Question 28

How do I debug a Lovable project?

Accepted Answer

Reproduce the bug, gather the exact error from the console or Logs, ask Lovable to diagnose in Plan mode before changing code, then request the smallest possible fix.

Question 29

How do I ask Lovable to diagnose an error without changing anything?

Accepted Answer

Use Plan mode, or explicitly tell Lovable in Chat to investigate and explain the cause without editing code — this stops it from making speculative changes while you're still working out what's wrong.

Question 30

How do I get Lovable to make the smallest possible fix?

Accepted Answer

Describe the exact symptom and error, explicitly ask for the minimal targeted change, and tell Lovable not to refactor or touch unrelated files.

Errors & Troubleshooting questions