critical error on the website
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This error means a fatal PHP issue occurred that WordPress could not recover from.
It commonly appears after a PHP upgrade when themes or plugins rely on deprecated functions or outdated syntax.
Checking the recovery email or enabling
WP_DEBUG_LOGusually reveals the exact cause. Functions removed in newer PHP versions or strict type errors are frequent triggers.The fix is typically updating or replacing the incompatible plugin or theme. In urgent cases, temporarily downgrading PHP gives you access to fix the root issue.
A common mistake is assuming WordPress core is broken when the issue lies in custom code.
The takeaway is to test PHP upgrades in staging before applying them live.