Fix · Lovable
Lovable App Not Working — How to Diagnose What Broke
Your Lovable app suddenly broke? Here are the 5 most common causes and how to fix each one.
Quick diagnostic
Three things to check first
Check the trigger
Look at the last successful run. If the trigger hasn't fired since, the issue is upstream — a webhook URL changed, a cron schedule was edited, or the source system stopped sending events. Start here before you look at the workflow itself.
Check the credentials
OAuth tokens expire quietly. API keys get rotated by a teammate who didn't know they were in use. A service account password changes upstream. Re-connect the integration that touches the step where the chain broke and try again.
Check the logs
Open the most recent failed run. The first red step is where the chain broke — usually a field name that changed in the source data, a rate limit that kicked in, or a timeout talking to a downstream service. Fix that one step and the rest of the chain usually recovers on the next run.
Your Lovable app was working yesterday and today it isn't. Maybe
you changed one thing, maybe you changed nothing. Either way,
paying users can't access what they paid for and you're trying to
figure out what broke without making it worse. The temptation is
to ask Lovable to fix it — resist. You'll end up in a doom loop
where the AI keeps regenerating code around the broken piece and
making the app harder to recover.
Open the app in a browser and note the exact symptom. A blank
page means the build succeeded but the runtime is failing — check
the browser console for a red error. A 500 or "something went
wrong" means the build failed or the backend is down — check the
Lovable deploy log. A sign-in page that doesn't accept credentials
means auth is broken — usually a Supabase redirect URL or an
environment variable that got reset on a redeploy. A page that
loads but shows no data means the Supabase connection dropped —
check the connection panel.
The pattern behind most of these is that Lovable is a platform
you trust, and when the platform silently changes something —
a Supabase URL, an env var, an auth redirect — it doesn't tell
you. You find out when a customer emails you saying the site
isn't working. The only defence is watching from outside the
platform, checking that the app actually responds correctly from
a real user's perspective, not just that the Lovable dashboard
says green.
The pattern
Most of these fail quietly.
Here’s the pattern: most automation and vibe-coded apps fail quietly. No alert, no error — just silence, until a customer notices. NoCrash watches your tools from outside and tells you in plain language, every morning, what ran clean and what didn’t. Peace of mind, not a log dump.
Stop finding out from your customers.
One morning message telling you what ran clean and what didn’t. Free forever on 3 things to watch.
Common questions