Documentation

Fixing things

A few checks to help you get back on track.

What you seeWhat to try
A page 404s and the file is thereCheck that the file is in the expected folder and that the link matches its name. For example, about.html at the top level answers /about. See Paths and routing.
Reloading a route in my app 404sName your entry file 200.html.
A redirect does not fireCheck whether a file still exists at the old address. Files take priority over redirect rules. See Redirects.
One redirect rule is ignoredCheck for unsupported syntax, such as * together with :name, a ? in the source path, or a country or language condition. See Redirects.
A header is not on the responseCustom headers are only added to files served normally, never to redirects, 404s, the password form or the editor preview. Check on the live address, not in the editor.
One header is missing, the rest are thereCheck that its line is indented and the header is supported. See Headers.
I updated a file and still see the old oneCheck that the uploaded file includes your change, then look for a custom Cache-Control rule in _headers that lets browsers keep an older copy. See Caching.
My API receives {{MY_KEY}}Check that the API’s host is on the secret’s allowed list. See Environment variables.
A variable is undefinedCheck the name: uppercase letters, digits and underscores only. The variables are defined at the top of every HTML page, so any script a page loads can use them.
A deploy fails on commitCheck the error message first. One common cause is the archive structure: index.html needs to be at the top level. Zip the folder’s contents rather than the folder itself.
My custom domain shows a security warningCheck your DNS records and domain status in settings. HTTPS setup may still be in progress. Also check that your paid subscription is active. See Custom domains.
My site says it is offlineIt was switched off in the site’s settings. Switch it back on there.

Still stuck? Email hello@lovelyco.de with your site’s address and what you’re seeing.

Last updated 11 September 2026