White screen of death on WordPress
Why it happens on WordPress
WordPress suppresses PHP fatals in production, so a plugin conflict after an auto-update produces a blank admin and front end with nothing written to the browser at all.
The fix on WordPress
Set WP_DEBUG and WP_DEBUG_LOG to true with WP_DEBUG_DISPLAY false in wp-config.php, reload the page, then read wp-content/debug.log for the fatal and the file that raised it. Recovery Mode emails also contain the plugin name when fatal-error protection triggers.
Is White screen of death happening on your domain?
The probe records both the status code and the response size. A 200 with a near-empty body is the exact signature of this failure and is invisible to status-only checks.
Free, no signup. Runs from outside your network, which is the only way to tell a server fault from a local one.
If that didn't fix it
WordPress has its own failure mode, but White screen of death has a wider set of causes that apply everywhere. The most common one overall is: a php fatal error in a plugin or theme after an update.
All causes and fixes for White screen of death