When a site breaks, the reason is almost always written down — in a log. Your site's Logs tab shows the most recent lines, refreshed about every minute.
The four logs
- Application — your app's own log (Laravel, WordPress debug). Errors your code reports.
- PHP — crashes and fatal errors in PHP itself. The classic "white screen" culprit.
- Web server errors — nginx problems: missing files, timeouts, upstream errors.
- Visits — the raw access log: every request with its status code.
How to read an error
Tick Errors & warnings only and look at the newest line. The pattern is usually what broke, where: PHP Fatal error: Call to undefined function xyz() in /…/plugin.php on line 12 — here a plugin file is the problem; disabling or restoring fixes it.
The fastest fix
If it broke right after a change: restore the last good snapshot, then retry the change carefully.