Scan rule · RSC-ARC-019
The app's data requests fail while loading
Observes in the browser whether requests to the app itself or its database end in a server error or network error while loading.
Why this matters
At first glance the page looks normal, but what it tries to load — content, the profile, a list — never arrives. Visitors see empty areas, spinners that never stop or a form that does nothing.
We only count requests to the app's own domain or its database (Supabase, Firebase and the like), and only server errors or network errors. A blocked ad tracker or a login rejected for visitors without an account is not a defect.
Scan tier
How to fix it
Open the red requests in the network tab: look up server errors (5xx) in the server or database log; network errors usually come from a wrong address or a missing setting.